Assignee dropdown does not display selected assignee

Closes #2472

See merge request !11744
 Conflicts:
	app/assets/javascripts/users_select.js

Strip trailing whitespaces in submodule URLs

Closes #33018

See merge request !11753

Fix: Milestone - Participants list is showing duplicate assignees

Closes #32690

See merge request !11758

Remove extra bottom padding on Job log page

Closes #30502

See merge request !11791

Center loading spinner in issuable filters

Closes #33137

See merge request !11818

Fix description flash with newline differences (HTML entities)

See merge request !11946

[ci skip]

Fix typo in moving the`appearance` folder in migrations

See merge request !2116

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/33265

[ci skip]

Fix visibility when referencing snippets

See merge request !2101

Move the uploads in the correct folder when moving project/namespace

See merge request !2112

[ci skip]

Show private subgroups if member of parent group

See merge request !11773

Reference: 3c7c859c359bf5d3955dd300d6861ff33af21ca7

Instead of plucking paths, and doing LIKE/OR on each of them, use a subquery to
find groups that are the ancestor of the projects the user is member of.

And not only the group in which the authorized project is located, but every
group that is a parent or grandparent of the group in which the project
resides.

(security-9-2) Upload files into `public/upload/system` instead of `public/upload`

See merge request !2104

Conflicts:
  app/validators/dynamic_path_validator.rb

Fixed conflicts based on 3c7c859c359bf5d3955dd300d6861ff33af21ca7

Restrict API X-Frame-Options to same origin

See merge request !2103

Allow users autocomplete by author_id only for authenticated users

See merge request !2100

Escapes html content before appending it to the DOM

See merge request !2107

This reverts commit 821daf70, reversing
changes made to cbde95c2.

When a user is authorized to a private project, the group of the project should
also be returned by the GroupsFinder.

If the user is member of one of the parent groups, also private groups should be
shown.

Fix issue realtime title/description change CSS transition

See merge request !11731

This was causing a weird bug in Safari where the CSS class wasn't applied yet the nextTick timeout was called meaning the CSS transition didn't happen

Closes #32932

[ci skip]

show loading indicator while waiting for assignees first fetch

Closes #32170

See merge request !11434

Fix ambiguous routing issues by teaching router about reserved words

See merge request !11570

32715 Make all notes use equal padding

Closes #32715 and #32467

See merge request !11616

Use refresh icon for retried jobs

Closes #32828

See merge request !11667

Read HEAD commit and use as sentry releases value

Closes #32535

See merge request !11565

Prevent errors from non-functional notify_post_receive endpoint

See merge request !11509

Fix pipeline etag

Closes #32658

See merge request !11615

Fix right-sidebar gap on mobile

Closes #32735

See merge request !11625