- using "actions" instead

- adding elements is done via actions
- comment cleanup needed

- rendering of Post Module (and every portal type) is done by controller gadget

- preparing refactoring on ojs_post_list: it will be a front page gadget with very few custom functionallity, and it will call controller for generic post module rendering

erp5_officejs: general refactoring on page rendering (document and module) and form definition handling

- generate action information will be done in utils.getFormDefinition
- every form definition will have its action list and all action info

- adding missing field properties like query and column_list on listbox field

- hateoas urls for get and store post module form definition

- use generic form view to render post list form