So it's more clear what could happen. Also add
more tests about the behaviour.

* upstream/master: (206 commits)
  Resolve "Monitoring graph date formatting is wrong"
  Add styles for shorter code
  Update doc for dind using overlay2
  Cleans merge_jid when possible on MergeService
  Rename MergeRequest#async_merge to merge_async
  Add changelog
  Track enqueued and ongoing MRs
  Remove locked? check when unlocking a merge request
  Update CHANGELOG.md for 9.5.2
  Update rubocop-gitlab-security to 0.1.0
  Fix spec
  Fix changelog
  Fix spec
  Add changelog
  Remove trigger_request.trigger.owner
  Reproduced bug
  Fix a transient failure in mini_pipeline_graph_spec
  fix typo
  fix spec
  Fix events error importing GitLab projects
  ...

Merge branch 'fix/sm/37040-regression-pipeline-trigger-via-api-fails-with-500-internal-server-error-in-9-5-1' into 'master'

Fix pipeline trigger via API fails with 500 Internal Server Error in 9.5.1

Closes #37040

See merge request !13861

Disable GitLab Project Import Button if source disabled

Closes #36882

See merge request !13789

Make member search dropdown consistent

See merge request !13546

Update doc for dind using overlay2

See merge request !13885

Remove unnecessary divider

Closes #37069

See merge request !13841

Ensure Prometheus graph overlay is in front of cursor flag

Closes #37102

See merge request !13867

Resolve "Monitoring graph date formatting is wrong"

Closes #37104

See merge request !13865

Present enqueued merge jobs as "Merging" as well (https://gitlab.com/gitlab-org/gitlab-ce/issues/31207 follow-up)

Closes #36114

See merge request !13483

Add styles for shorter code

See merge request !13612

Move ConvDev Index location to after Cohorts

Closes #34413

See merge request !13398

Update rubocop-gitlab-security to 0.1.0

See merge request !13879

Our state machine shall have enough knowledge to not allow states other
than locked from transitioning to opened (e.g. MergeRequest#unlock_mr).

Update and fix resolvable note icons for easier recognition

Closes #36582

See merge request !13821

Update templates to include header in the README

Closes #36904

See merge request !13785

[ci skip]

Fix a transient failure in mini_pipeline_graph_spec

Closes #34323

See merge request !13844

Add filtered search to group merge requests dashboard

Closes #36703

See merge request !13688

Add spec for deleting protected tags

See merge request !13693

Fix events error importing GitLab projects

Closes #36965

See merge request !13868

This spec failed reliably with a specific run order (see issue), the
reasons for which are still unknown. This simplification resolves the
failure.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/34323

Improve flaky ACE editor spec

See merge request !13854

fix transient dropdown test failures

Closes #37052 and #34436

See merge request !13862