Fixed padding and margins for the dropdowns on the members section

Reverted the change from the "expires_at" to "expires_at_groups" in the groups controller

Updated the js from the member_expiration_date to es6

Fixed more tests

view (removed an extra tag )

This controller is going to contain both the project members and groups options
for the settings gear.

Generated the route and modified the routing to point to the new members setting path

Use stable icon for Mattermost integration

See merge request !8252

Revert specific URL

See merge request !8321

Copy, don't move uploaded avatar files

Closes #26158

See merge request !8396

Fix cross-project references copy to include the project reference

Closes #25890

See merge request !8232

Remove bottom border from Issuable titles

See merge request !8278

[ci skip]

Fix Gemfile.lock for the octokit update

See merge request !8414

MR https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8158 updated
the octokit Gem but did not include all the changes for Gemfile.lock.

Also added relevant specs and refactored to_references in a bunch of places to be more consistent.

rewrite the item.respond_to?(:x?) && item.x? to item.try(:x?)

See merge request !8409

Add tests to cycle analytics

See merge request !7727

API: extern_uid is a string

Closes #26227

See merge request !8404

Update octokit to 4.6.2

See merge request !8158

Increases pipeline graph drowdown width in order to prevent strange position on chrome on ubuntu

Closes #26218

See merge request !8399

Adds MR ID to changelog entry

Remove time zone information from assertion in timeago tooltips spec

Closes #26183

See merge request !8374