Split local Text Post storage from the configurator Person storage,
completely rewrite URL matching regexp, handle Handlebars' =,
add field in MappingStorage to keep mapping in the main document,
always set that to true, wrap custom configs in MappingStorages,
use Rusha to generate SHA1 hashes of JSON messages for mapping,
set dav_url as the value of its input and not the placeholder,
rename connect-form to storage-form to avoid style conflicts,
wrap labels and inputs by <label>, prepend "chat-" to stuff,
remove all line breaks from all forms, make email readonly,
prepend https:// instead of http:// to protocol-less URLs,
update join_time on actual join instead of jIO discovery,
use has_joined instead of message_count > 0 for joining,
create all queries as modifications to a general_query,
stop repairing the non-replicate configurator storage,
shift the chat-hidden class instead of style.display,
and leave all the things with XXX to future commits!

Remove all chat-specific modifications to common OfficeJS files
such as erp5_launcher_nojqm.js and gadget_erp5_nojqm.css;
copy the latest version of gadget_erp5_nojqm.css into
gadget_erp5_nojquery.css and only add FontAwesome icons;
keep all chat-specific styles in gadget_erp5_chat.css,
including input padding, button colours, and a hidden class;
add chat_connect and chat_disconnect pages to chat_panel.html;
rename all configurator page titles from "Gadget" to "Page";
and only store Persons in the local configurator IndexedDB.

Add gadget_erp5_page_chat_disconnect to clear settings and redirect;
remove line breaks and prepend "chat-" to chat-specific classes;
and add Rusha in preparation of future hash-related adventures.

Put MappingStorage over ERP5Storage to map the proper mappings,
by replacing its relative_url IDs with the mapping property.

Change other minor things: sort only by date_ms, not content,
rename author to sender as per the commit before the last commit,
store only the epoch time in milliseconds in messages, not Dates,
and keep only the raw nameToId in id_to_name, not chat-contact-.

Bring back MappingStorage to deal with more duplication bugs,
but remove Handlebars because the erp5_officejs bt5 already has it.

Rename mapping_id to mapping, because that makes mappings show up,
add TextPost_viewAsJio, because that's the default_view_reference,
rename sender to author, because that makes senders queryable,
and add mapping as a searchable text property, because of the above.

Store only text content in jIO instead of the full stringified message,
rename message properties and recolour old messages to deal with that,
move jIO and MappingStorage scripts around in chat box and room HTML,
use room in queries because room is in the TextPost property sheet,
make the chat box redirect to chat connect if user_email is falsy,
completely refactor configurator files to delete custom settings,
remove requireSetting, and pass JSLint on all of them; finally,
store ID in mapping_id property in preparation for more fun.

Add the text_post_module module, the erp5_text_post skin folder,
the TextPost property sheet, the last workflow history of all files,
and the Text Post (Module) portal types, workflows, actions, etc.
to the business template, along with the associated XML updates.

Remove erp5_page_launcher.html and erp5_page_launcher.js because
all my custom modifications were completely unnecessary, and
add officejs_chat_launcher.html to use the custom chat CSS
and jio_mappingstorage_js for future fun with jIO mapping storage.

Update IDs of missing Web Pages to add them to the business template:
erp5_page_launcher.html, gadget_erp5_chat.css,
gadget_erp5_chat_header.html, gadget_erp5_chat_header.js,
gadget_erp5_page_jio_configurator.html, and
gadget_erp5_page_jio_configurator.js.
Also add the Web Site officejs_chat.

Remove contact list from the panel gadget and delete its Web Pages:
gadget_erp5_page_contact_add.html, gadget_erp5_page_contact_add.js,
gdaget_erp5_page_contact_list.html, gadget_erp5_page_contact_list.js,
gadget_erp5_page_jio_person_view.html, and
gadget_erp5_page_jio_person_view.js.

Add gadget_erp5_chat_room to the business template after forgetting to,
remove fast priority queue because everything is already sorted,
and make both contact list and chat list scroll with a fixed height.

Remove FastPriorityQueue because jIO already sorts everything
and gadget.state.message_list_dict[room] is always sorted,
fix the merge algorithm to not use a priority queue at all,
add POLL_DELAY_LIST to customize increasing polling intervals,
add current_refresh_dict as a mutex over refreshChat(),
and add requirements to function docstrings.

Store a jio_configuration string in ERP5 Persons to share contact info,
remove the entire concept of folders and replace it with rooms instead,
use emails to find contacts, replace ERP5 Python Scripts with pure jIO,
move query helpers to gadget_global and force names to be alphanumeric.

Make WebRTC gadget spawn a new hidden div inside the chat panel
instead of indefinitely expanding downwards, highlight current room,
remove automatic login and authentication, add field for hateoas URL,
move all utility functions such as logError into gadget_global.js,
add hasOwnProperty, send join/quit notifications in bundles once more,
fix cannot-make-second-connection bug by resetting host candidate,
change declareService to submit onEvent, split submit buttons among
separate forms, and declare chat panel functions as gadget methods.

Add font, remove unused JIO Mapping Storage,
split chat box into contacts and chats tabs,
only send join and leave notifications to others,
add message colours, change styles with favicons,
declare new WebRTC gadgets for every room connection,
create new room with their own names for each client,
manage more query values in parent gadget with less code,
generate Dropbox link to stuff URL queries as state info,
prepare parseParams to handle new connections from the panel,
strip whitespaces, delete "my_", remove line breaks with CSS,
understand how queues in .ready() block .declareService() forever,
and finally, use flexbox CSS to completely overhaul look and feel.

Instead of having chat_panel as a subgadget of chat_webrtc,
both chat_panel and chat_webrtc are direct subgadgets of chat.
Strip out all chat-related functions and variables from chat_webrtc,
so that it can be used for non-chat-related purposes in the future.
Bundle state variables into dictionaries for cross-gadget passing.
Completely rewrite HTML structure to reflect a linear hierarchy.
Fully document and augment existing URL query parameters.
Replace all var declarations with let or const from ES6.
Modify chat panel message_list and last_message_dict
to prepare for multi-room messaging, coming soon.

Allow users to configure storage synchronization options during login,
with the choice of ERP5, Dropbox, WebDAV, or no remote storage.
Remove gadget_erp5_chat_login by merging it with the main page.
Use mapping storage and remove peer_source from messages.

Store all chats as Text Posts using ERP5 in a replicate storage.
Synchronize divergent chats through a three-step process:
1. send doubler (request a request from the host)
   receive request (get dict of host's last-seen messages)
2. send archive (give all new messages to the host)
   receive doubler (get after host is fully updated)
3. send request (give dict of your last-seen messages)
   receive archive (get all new messages from all peers)

This means that Space Chat now synchronizes correctly even when
peers disconnect from each other, and all chat messages will
eventually be stored on ERP5 as soon as one peer reconnects.

Co-opt Webrtc Rooms module to directly store negotiations as attributes,
integrate Space Chat with ERP5 and pass parameters through the URL,
move Dropbox main login page, and make authentication more robust.

Abstract WebRTC signalling to prepare for ERP5,
detect client browser unloading and send message,
directly display URLs of images as an actual <img>,
add global "notifications" such as joining and /help,
clean names to avoid OAuth2 state conflicts in the URL,
make Dropbox authentication more robust against failures,
and parse non-image URLs as <a> using a regular expression.

Add initial files for space chat project. Features include:
- Real-time text-based communication system over WebRTC
- Modular chat separation into 'folders' and 'rooms'
- Multiple signalling options, including text or Dropbox
- Configurable local storages like IndexedDB using jIO
- Follows WebRTC best practices by using adapter.js shim
- Adjustable polling behaviour for managing Dropbox offers
- Powerful offline synchronization algorithms within rooms

Actually none of the above are even features, this chat is very bad.

The file list is:
- adapter.js: shim for cross-browser WebRTC compatibility
- fast_priority_queue.js: by adamhooper, for sorting messages
- gadget_erp5_chat: main chat gadget, contains local storage and login
- gadget_erp5_chat_login: gadget to get name, folder, and room from user
- gadget_erp5_chat_webrtc: WebRTC signalling gadget to open communications
- gadget_erp5_chat_panel: actual chat gadget, has all the chatting functions

MonthlyRangeMovementGroup: make tested property list configurable, whose default is ('start_date', 'stop_date').

Fix inconsistencies from gadgets

/cc @jerome 

/reviewed-on !225

erp5_knowledge_pad: Fix inconsistency with preferred_height and preferred_width in google_maps gadget

ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/google_maps (message: Attribute preferred_width should be of type string but is of type <type 'int'>)
ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/google_maps (message: Attribute preferred_height should be of type string but is of type <type 'int'>)

erp5_knowledge_pad: Fix inconsistency with preferred_height and preferred_width in google_calendar gadget

ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/google_calendar (message: Attribute preferred_width should be of type string but is of type <type 'int'>)
ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/google_calendar (message: Attribute preferred_height should be of type string but is of type <type 'int'>)

erp5_knowledge_pad: Fix inconsistency with preferred_height and preferred_width in google_search gadget

ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/google_search (message: Attribute preferred_width should be of type string but is of type <type 'int'>)
ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/google_search (message: Attribute preferred_height should be of type string but is of type <type 'int'>)

ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/clock (message: Attribute preferred_width should be of type string but is of type <type 'int'>)
ERP5Type.ConsistencyMessage for PropertyTypeValidity type_check on portal_gadgets/clock (message: Attribute preferred_height should be of type string but is of type <type 'int'>)

erp5_payroll_l10n_fr: reflects change in entreprise/employer from paysheets into the dialog aggregating paysheets for DSN social reports