Add month unit

See merge request gitlab-org/gitlab-ce!23297

Speed up setting of relative position

See merge request gitlab-org/gitlab-ce!23324

Resolve "Filter by `None`/`Any` for labels in issues/mrs API"

Closes #52371

See merge request gitlab-org/gitlab-ce!22622

Add docs note for Reverting MR availability

See merge request gitlab-org/gitlab-ce!22289

add a note about omnibus chart and info how to backup with gitlab chart

See merge request gitlab-org/gitlab-ce!23097

CE port: Promote the GitLab.com Gold trial on a users default dashboard

See merge request gitlab-org/gitlab-ce!22901

[docs] Enable importing from other sites

See merge request gitlab-org/gitlab-ce!23082

Set content disposition attachment to several endpoints

See merge request gitlab-org/gitlab-ce!23223

Add instructions on how to add Prometheus as data source in Grafana

See merge request gitlab-org/gitlab-ce!23273

Replace public_jobs attribute with public_builds attribute in Projects API docs

See merge request gitlab-org/gitlab-ce!23194

Add missing languages in Proofreaders page

See merge request gitlab-org/gitlab-ce!23243

Deploy cert-manager to managed cluster for SSL certificates

See merge request gitlab-org/gitlab-ce!23036

Refactor landing page CE

See merge request gitlab-org/gitlab-ce!23215

By using the parameters `?labels=None|Any` the user can filter
issues/mrs from the API that has `none/any` label.

Affected endpoints are:

- /api/issues
- /api/projects/:id/issues
- /api/groups/:id/issues
- /api/merge_requests
- /api/projects/:id/merge_requests
- /api/groups/:id/merge_requests

Fix 404ing links for NGINX ingress controller

See merge request gitlab-org/gitlab-ce!23258

Move links to HTTPS to avoid possible 503 errors in broken link checkers

See merge request gitlab-org/gitlab-ce!23313

refresh the path to performance bar in admin settings with the up-to-date value

See merge request gitlab-org/gitlab-ce!23316

update screenshot for request profiling token

See merge request gitlab-org/gitlab-ce!23317

Delete Research proposal.md

See merge request gitlab-org/gitlab-ce!23322

Clean up fix for RegisterJobService

See merge request gitlab-org/gitlab-ce!23315

Resolve "Improve issues list empty state when a filter is selected"

Closes #53326

See merge request gitlab-org/gitlab-ce!22775

1. When every issue has a relative position set, we don't need to
   perform any updates, or calculate the maximum position in the parent.
2. If we do need to calculate the maximum position in the parent, many
   parents (specifically, groups with lots of projects) leads to a slow
   query where only the index on issues.relative_position is used, not
   the index on issues.project_id. Adding the GROUP BY forces Postgres
   to use both indices.

Explicitly set locale fallbacks

Closes #54274

See merge request gitlab-org/gitlab-ce!23271

Rails5 deprecation: :nothing option is deprecated, Use head method to respond with empty response body.

See merge request gitlab-org/gitlab-ce!23311

Correctly styles tags in jobs sidebar

Closes #54391

See merge request gitlab-org/gitlab-ce!23319

The tags were using the `label` class
instead of `bagde` which is the new BS class

Allow commenting to resolved non-diff discussions

Closes #54330

See merge request gitlab-org/gitlab-ce!23279

Add support for custom highlighting slash commands via warning flags

See merge request gitlab-org/gitlab-ce!23277

Rails5: env is deprecated and will be removed from Rails 5.1

Closes #54384

See merge request gitlab-org/gitlab-ce!22626