CE upstream

Closes gitlab-ce#26813 and gitlab-ce#25989

See merge request !1102

Add existence checks before creating the timelogs table and time_estimate columns

Closes #1578

See merge request !1099

Add metric initializer spec

See merge request !1109

[EE] Dont persist application settings in test env

See merge request !1098

Fix count of required approvals displayed on MR edit form

Closes #1078

See merge request !1082

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

Add docs on multiple issue boards

See merge request !1110

[ci skip]

Don't try to show assignee in approved_merge_request_email if there's no assignee

Closes #1601

See merge request !1103

An empty file in one of the instrumented directories will cause the app
to fail to start when metrics are enabled. Metrics aren't enabled by
default in development or test.

We could handle the empty file case explicitly, but a file could still
not define the constant it is expected to, so instead run the
initializer manually in a spec and check that it succeeds.

Removed project edit visibility radio buttons

Closes gitlab-ce#27050 and gitlab-ce#27049

See merge request !1097

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

Closes #1457

See merge request !1051

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

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

Document removing approval

See merge request !1086

Resolve "Comment/Description textarea shows a blue border on the left"

Closes #27066

See merge request !8720

Pick security fixes from 8.16.1 et al into master

Closes #26813, #26249, #26259, #26243, #26242

See merge request !8724

Rename endboss -> maintainer, miniboss -> reviewer

See merge request !8719

Handle unsubscribe notification via email

Closes #22619

See merge request !6597

Allow creating protected branches when user can merge to such branch

Closes #22638

See merge request !8458

Remove rogue scrollbars from some issue comments

Closes #25989

See merge request !8652

Allow issue filter submission using mouse only

See merge request !8681

Upgrade OmniAuth Ruby gem to 1.3.2

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/26813

See merge request !2056

Prevent users from creating notes on resources they can't access

See https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2054

Ensure that only privileged users can access merge requests in the API

See merge request !2053

Fix export files not removed when a user takes over a namespace

See merge request !2051

Fix users being able to delete instance public deployment keys

See merge request !2049

adds events to services api deserialization

Closes #22974

See merge request !8324

Track Mattermost usage

See merge request !1071

[ci skip]

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

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

This reverts commit 9eab2270, reversing
changes made to 46f2709d.

Add hover style for copy icon in commit page header

Closes #26787

See merge request !8619