CE Upstream - Friday

Closes gitlab-ce#27955

See merge request !1218

Add member: Always return 409 when a member exists

See merge request !1215

The EE version of the protected branches JS doesn't take a label...

We should really reduce the disrepancies between CE and EE for this
feature.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Port of "clean-javascript-vendor-files" to EE

See merge request !1223

Squashed commit of the following:
    convert js-cookie dependency to an npm module
    convert timeago.js dependency to an npm module
    remove vue from vendor since it is now in node_modules

Fix bundle tag in anaytics page

See merge request !1222

Signed-off-by: Rémy Coutable <remy@rymai.me>

Hide squash checkbox when there is a single commit

Closes #1697

See merge request !1213

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

When there is only one commit, the squash checkbox doesn't do
anything. When a commit is added after the widget is loaded, the MR
can't be merged anyway - you have to refresh the page. So we can only
show the checkbox on page load if there's more than one commit.

Fix admin_labels_spec.rb transient failure

Closes #27855

See merge request !9135

Show Pipeline(not Job) in MR CI status desktop notification

Closes #27955

See merge request !9122

* master:
  Remove a transient failure from spec/requests/api/groups_spec.rb
  Update PROCESS.md
  Update MergeRequest API state_event option documentation

Make sure our current .gitlab-ci.yml is valid

See merge request !9125

Remove a transient failure from spec/requests/api/groups_spec.rb

Closes #27974

See merge request !9116

Re-add removed params from projects and issues V3 API

Closes #1698

See merge request !1209

Update MergeRequest API state_event option documentation

See merge request !1205

Update MergeRequest API state_event option documentation

Closes #25566

See merge request !8077

Add clarification to RC1 date

See merge request !9104

* master:
  Rename issuable to IssueBase

Rename issuable to IssueBase

See merge request !9127

This could prevent errors described in:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8970

Everything we're using right now, should be valid of course.

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/27955

Added header to protected branches access dropdowns

See merge request !8774

Port of revert-0ef587b6 to EE

See merge request !1204

Allow copying a created branch name to the clipboard.

See merge request !9103

Responsive title in diffs inline, side by side, with and without sidebar

Closes #25709

See merge request !8707

Fix contribution activity alignment

Closes #27943

See merge request !9101

Add a spec for our custom GemFetcher cop

See merge request !9076

Port "Upgrade to webpack v2.2.1" to EE

See merge request !1203

Upgrade to webpack v2.2.1

See merge request !9078

Fixes dropdown width in admin project page

Closes #27726

See merge request !9002