Make transfer project dropdown in project settings consistent

What does this MR do?

Change the Transfer project dropdown in project settings to new style.

Screenshots

Before	After

What are the relevant issue numbers?

#28921 (moved), #35424 (closed)

the changes overlap with https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13562

mentioned in issue #28921 (moved)

assigned to @winh

assigned to @cperessini

added 700 commits

• 53c442e9...ef8eb3f6 - 699 commits from branch master
• 3c3e0678 - Make transfer project dropdown in project settings consistent

Compare with previous version

@winh LGTM. Approving.

assigned to @winh

approved this merge request

I had to rebase because of conflicts. I made sure it still looks the same after the rebase.

added 150 commits

• 3c3e0678...499b6406 - 149 commits from branch master
• 75183fbd - Make transfer project dropdown in project settings consistent

Compare with previous version

I had to rebase again because of conflicts. I made sure it still looks the same after the rebase.

added 157 commits

• 75183fbd...91a55ed6 - 156 commits from branch master
• 39a4c70a - Make transfer project dropdown in project settings consistent

Compare with previous version

added 157 commits

• 75183fbd...91a55ed6 - 156 commits from branch master
• 39a4c70a - Make transfer project dropdown in project settings consistent

Compare with previous version

assigned to @iamphill

approved this merge request

merged

mentioned in commit d4ec6318