"Reset approvals on push" also reset approvals of a closed merged request

Closes #1457

See merge request !1051

Document removing approval

See merge request !1086

Track Mattermost usage

See merge request !1071

[ci skip]

GitLab Pages documentation refactor

Closes #465

See merge request !1072

[ci skip]

CE upstream

Closes gitlab-ce#26785

See merge request !1096

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Force JSON parsing of approvals API response data.

Closes #1575

See merge request !1095

correct the prometheus feature configuration according to https://gitlab.com/git…

See merge request !8703

correct the prometheus feature configuration according to https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/files/gitlab-config-template/gitlab.rb.template#L1147

Make cycle_analytics_events_spec.rb side-effect free

Closes #26622

See merge request !8594

Fixed incorrect class names used in merge request widget

See merge request !1093

Merge request widget class names update

See merge request !8700

[ci skip]

[ci skip]

[ci skip]

Replace merge request widget body

See merge request !8697

Add Prometheus docs

See merge request !8699

[ci skip]

Fixed bug with merge immediately button not working

See merge request !8696

[ci skip]

Replaces https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/1237
Omnibus MR: https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/1227
Omnibus issue: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1481

This was caused by using 'this' in a fat arrow function, so 'this' would not equal the jQuery element