Make mirror user dropdown in project settings consistent

See merge request !2706

Make target branch dropdown on merge request edit page consistent

See merge request !2805

Make protected branches / tags permission dropdowns consistent

See merge request !2781

Geo - Whitelist LFS requests to download objects on a secondary node

Closes #3232

See merge request !2758

Add settings for minimum key strength and allowed key type (EE)

See merge request !2776

Geo::RepositySyncWorker should attempt to sync all projects

Closes #3259

See merge request !2796

Switch out resolver to mitigate SocketError

See merge request !2809

Make merge request form dropdowns consistent

See merge request !2790

Make go to issue board dropdown style consistent

See merge request !2641

Move "Move issue" to sidebar - EE merge edition

Closes gitlab-ce#34261

See merge request !2715

Fix merges not working when project is not licensed for squash

Closes #3321

See merge request !2817

Fix unsetting credentials data for pull mirrors

Closes #3308

See merge request !2810

This is an amalgamation of:

* Cory Hinshaw: Initial implementation !5552
* Rémy Coutable: Updates !9350
* Nick Thomas: Resolve conflicts and add ED25519 support !13712

Instead of running the sync 10 times, just run it twice and see if the
worker attempts other projects than it did in the first run.

If some projects fail to sync, Geo::RepositySyncWorker should not take
the same set of projects over and over again. But try to sync all of
them.

Closes gitlab-org/gitlab-ee#3259

Add icon for billing

Closes #3297

See merge request !2814

[ci skip]

[ci skip]

Closes #3321

Extend early adopters feature set

Closes gitlab-com/support-forum#2398

See merge request !2816