Add feature highlight to Issue Boards in new navigation sidebar

Closes #36760

See merge request !13515

Remove unused methods from `IssuesHelper` and `IssuablesHelper`

See merge request !13793

Move GitOperationService to Gitlab::Git

See merge request !13984

Remove unused code

See merge request !13657

Prepare GitOperationService for moving to Gitlab::Git

See merge request !13773

Only require `simple_po_parser` in rake task that needs it

Closes #37379

See merge request !14018

Use new MR icon for milestone sidebar

Closes #36452

See merge request !14004

Make Pikaday dropdowns style consistent

See merge request !13426

Make issuable sidebar dropdowns style consistent

See merge request !13424

Make merge request form dropdowns consistent

See merge request !13587

Make create merge request / branch dropdown on issue page style consistent

See merge request !13457

Make deploy-to dropdown on environments page consistent

See merge request !13544

Make build job stage dropdown consistent

See merge request !13543

Make pipeline action dropdowns consistent

See merge request !13534

Further improvements to Helm Chart documentation - docs

Closes #37295

See merge request !13964

Add to_project_id parameter to Move Issue via API example

Closes #15669

See merge request !14008

Fix typo in the API Deploy Keys documentation page

See merge request !14014

Move "Move issue" to sidebar

Closes #34261

See merge request !13616

Fix failling spec/features/task_lists_spec.rb due to wrong login helpers

See merge request !14021

Approve the Unlicense

See merge request !14001

Hide Koding setting in admin panel if not enabled

Closes #30162

See merge request !13992

Protected runner executes jobs on protected branch [Solution 1]

Closes #33281

See merge request !13194

Sort templates when fetching them

Closes #37153

See merge request !13920

Make label actions dropdown style consistent

See merge request !13478

Make comment actions dropdown style consistent

See merge request !13476

That way we don't need to install it in production, since it's really
not needed there.

This was failing on master (e.g. https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/31176922)

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/34261

[ci skip]