Resolve "Predefined Variable GITLAB_USER_NAME"

Closes #26692

See merge request !13824

Use google-protobuf 3.4.0.2

See merge request !13796

Make merge request version dropdowns consistent

See merge request !13590

Make namespace select dropdowns consistent

See merge request !13626

Remove accidental console.log from karma tests

See merge request !13936

Default LDAP config verify_certificates to true

Closes #33662

See merge request !13915

New syntax for CI/CD job triggering policy that supports variables expressions

See merge request !13769

Fixed fly-out nav jumping

Closes #36699

See merge request !13690

Upgrade mail and nokogiri gems due to security issues

See merge request !13662

Document swappiness recomendations in the requirements doc

See merge request !13943

Rename prometheus Vue components

See merge request !13938

Make namespace dropdown on new project page consistent

See merge request !13628

Increase z-index of dropdowns

Closes #36766 and #36866

See merge request !13889

Fix invalid attribute used for time-ago-tooltip component

Closes #37163

See merge request !13899

Update latest artifacts doc

See merge request !13924

Remove unwanted refs after importing a project

Closes #36807

See merge request !13766

Improve migrations using triggers

Closes #36633

See merge request !13666

Add time stats to Issue and Merge Request API

Closes #28453

See merge request !13335

Removed tooltips from new sidebar

Closes #35658

See merge request !13489

Update share project with groups docs

See merge request !13843

* upstream/master:
  Don't use public_send in destroy_conditionally! helper
  Fix MySQL failure for emoji autocomplete
  max-width for lazy-loaded images (this was removed in the original MR through merge resolution most probably)
  Replace 'project/user_lookup.feature' spinach test with an rspec analog
  Move GPG signed commits docs to new location

[ci-skip]

Closes #35658

Replace 'project/user_lookup.feature' spinach test with an rspec analog

See merge request !13863

Resolve "Mysql2::Error: Unknown column 'award_emoji.count' on master"

Closes #37231

See merge request !13926

Resolve "README.md: Header image scale not limited"

Closes #37058, #37024, and #37230

See merge request !13869

As we only override in two places, we could just ask for the value rather than
the method name.

Move GPG signed commits docs to new location

Closes #36804

See merge request !13872

* upstream/master: (225 commits)
  Add changelog entry
  Backports EE 2756 logic to CE.
  Make rubocop happy
  Make profile settings dropdown consistent
  Add filter by my reaction
  Update spec initialization with it being a shared component
  Update identicon path and selector
  Renamed to `identicon` and make shared component
  Merge branch 'master-i18n' into 'master'
  Fix broken Frontend JS guide
  Replace 'project/star.feature' spinach test with an rspec analog
  Adds position fixed to right sidebar
  Fixes the margin of the top buttons of the pipeline page
  Remove commented out code
  Better align fallback image emojis
  Decrease Metrics/CyclomaticComplexity threshold to 15
  Add changelog
  Respect the default visibility level when creating a group
  Further break with_repo_branch_commit into parts
  Make sure inspect doesn't generate crazy string
  ...

Update backup_restore.md documentation regarding S3 and IAM profiles.

See merge request !13871