Resolve "Update styling of empty states"

Closes #40468

See merge request gitlab-org/gitlab-ce!15791

Resolve "Prometheus loading screen no longer seems to appear"

Closes #40285

See merge request gitlab-org/gitlab-ce!15889

CE Backport - Fix order-dependent spec failure by avoiding monkeypatching

See merge request gitlab-org/gitlab-ce!15893

removed tab indexes from tag form

See merge request gitlab-org/gitlab-ce!15886

Return the noteable in Note#touch_noteable

See merge request gitlab-org/gitlab-ce!15891

Merge branch 'tmlee/gitlab-ce-28004-consider-refactoring-member-view-by-using-presenter' into 'master'

Refactor member view by using presenter

Closes #28004

See merge request gitlab-org/gitlab-ce!15715

Fix entrypoint overriding documentation

See merge request gitlab-org/gitlab-ce!15884

This allows EE to re-use the object, making it easier to trigger
indexing of the noteable.

Handle domain sessions better in QA scenarios

Closes gitlab-qa#102

See merge request gitlab-org/gitlab-ce!15452

Clean up new dropdown styles

Closes #39142 and #39446

See merge request gitlab-org/gitlab-ce!13676

Remove unnecessary js-issuable-edit

Closes #41042

See merge request gitlab-org/gitlab-ce!15883

Use memoization for commits on diffs

See merge request gitlab-org/gitlab-ce!15857

check the import_status field before doing SQL operations to check the import url

See merge request gitlab-org/gitlab-ce!15752

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

Hide issues and MRs in labels list if disabled

See merge request gitlab-org/gitlab-ce!15863

Move Repository#write_ref to Git::Repository#write_ref

Closes gitaly#793

See merge request gitlab-org/gitlab-ce!15712

Treat empty markdown and html strings as valid cached text, not missing cache…

See merge request gitlab-org/gitlab-ce!15856

The Gitaly CommitService is being hammered by n + 1 calls, mostly when
finding commits. This leads to this gRPC being turned of on production:
https://gitlab.com/gitlab-org/gitaly/issues/514#note_48991378

Hunting down where it came from, most of them were due to
MergeRequest#show. To prove this, I set a script to request the
MergeRequest#show page 50 times. The GDK was being scraped by
Prometheus, where we have metrics on controller#action and their Gitaly
calls performed. On both occations I've restarted the full GDK so all
caches had to be rebuild.

Current master, 806a68a8, needed 435 requests
After this commit, 154 requests

Use Single list for multiple clusters

See merge request gitlab-org/gitlab-ce!15848

Backport a spec fix done in EE (5dbecb8e) to CE

See merge request gitlab-org/gitlab-ce!15842

Treat empty markdown and html strings as valid cached text, not missing cache that needs to be updated

Use message body for merge request description

Closes #40968

See merge request gitlab-org/gitlab-ce!15839

Merge branch '41041-undefined-method-new_project_guidelines_html-unable-to-load-from-cache' into 'master'

Resolve "undefined method `new_project_guidelines_html', unable to load from cache"

Closes #41041

See merge request gitlab-org/gitlab-ce!15878

Clears the current Appearance cache otherwise it breaks since new_project_guidelines_html would be missing

Solves https://gitlab.com/gitlab-org/gitlab-ce/issues/41041.
Signed-off-by: Rémy Coutable <remy@rymai.me>

* master: (54 commits)
  Updated image for diff navigation docs
  Milestone sidebar docs
  Use app host instead of asset host when rendering image blob or diff
  ActiveRecord::StaleObjectError: Attempted to update a stale object: Ci::Build
  Use shared interceptor in note specs
  Ignore temporary table in schema
  Check for null in job tooltip title
  Clarify casing of I18N placeholder names
  fixes some markup issues in the js style guide docs
  Fix migration that removes issues.branch_name
  small change to make less conflict with EE version
  Add cop for use of remove_column
  Resolve merge conflicts with dev.gitlab.org/master after security release
  add index for doc/administration/operations/
  Remove RubySampler#sample_objects for performance as well
  Bugfix: User can't change the access level of an access requester
  Add spec for removing issues.assignee_id
  updated imports
  Keep track of storage check timings
  Remove a header level in the new 'Automatic CE->EE merge' doc
  ...