Lazily set UUID in ApplicationSetting for new installations

Closes gitlab-ee#2246

See merge request !10893

Increase code coverage for admin/cohorts page

See merge request !10964

Update mail gem to 2.6.5

See merge request !10951

Remove unused code

Closes #31202

See merge request !10897

Use vue files for vue components.

See merge request !10882

Fix checks markup in bug template

See merge request !10963

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

Make namespace owner master of project upon creation

Closes #29446

See merge request !10910

Remove view fragment caching for project READMEs

Closes #26585 and #29594

See merge request !8838

Allow admins to sudo to blocked users

See merge request !10842

When an admin creates a project in the namespace of a user, that user
automatically gains master access to that project.

The `MarkupHelper#markup` method does everything we need here.

Because the post-processing of the rendered README is dependent on the
context (i.e. the current user), do the post-processing when the
README is being displayed.

It does more than solely GitLab Markdown, so rename to MarkupHelper.

Triple backticks aren't allowed inside <details> elements, so add an explicit
<pre> instead.

Add username to activity atom feed

Closes #31268

See merge request !10802

See pull request https://github.com/gitlabhq/gitlabhq/pull/10429

Remove description for build_events, add pipeline_events

Closes #30645

See merge request !10908

Fix typo found in issue board sidebar milestone dropdown

Closes #31475

See merge request !10950

Update troubleshooting section

Closes #13479

See merge request !10618

don't require no_root_squash on NFS, only recommend

See merge request !10197

clarify when GitLab pages requires special config for load balancer

See merge request !10954

This should fix the extra backslashes in e-mail names as well
as other things: https://github.com/mikel/mail/blob/master/CHANGELOG.rdoc#head