Change hover style definition from explicit rgba value to variable

Removed style from page-header.scss that was overriding .btn styles

Add hover style for copy icon in commit page header

Change hover style definition from explicit rgba value to variable

Removed unnecessary styles on commits.scss

Make cycle_analytics_events_spec.rb side-effect free

Closes #26622

See merge request !8594

Merge request widget class names update

See merge request !8700

[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

Update autodeploy templates [ci skip]

See merge request !8695

Button by itself will submit forms. Button type button willn't

Closes #26999

See merge request !8694

Revert "Merge branch 'dont-persist-application-settings-in-test-env' into 'master'"

See merge request !8690

Introduced an offset limit to prevent the dropdown from going far right

Closes #26618 and #27023

See merge request !8679

This reverts merge request !8573

Fix Merge When Pipeline Succeeds immediate merge bug

Closes #26969

See merge request !8685

Filtered search input click back at token

See merge request !8617

Fix DropLab in IE11 v1 (merge edition)

Closes #26785

See merge request !8689

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/26785

Fixed edge cases with changing value