Center loading spinner in issuable filters

Closes #33137

See merge request !11818

Check only a merge ability for protected actions

Closes #32618

See merge request !11648

Ask for an example project for bug reports

See merge request !11819

Add tag_list param to project api

Closes #33000

See merge request !11799

Add API support for pipeline schedule

Closes #30892

See merge request !11307

Allow PostReceivePack to be enabled with Gitaly

Closes gitaly#246

See merge request !11809

* Bugs reported in the GitLab Issue trackers should be reproducible
* Asking reporters to reproduce on GitLab.com is reasonable
  * It lets us know whether the issue still exists in latest
  * It ensures that the steps to reproduce are solid
  * It gives Developers a live example to work from
  * Reporter can verify the fix in the example project once shipped

[skip ci]

Return nil when looking up config for unknown LDAP provider

Closes #29342

See merge request !11804

Revert "Merge branch 'grpc-1.3.4' into 'master'"

See merge request !11813

This reverts merge request !11645

Resolve "Allow to disable username on checkout url"

Closes #30410 and #30174

See merge request !11792

Remove extra bottom padding on Job log page

Closes #30502

See merge request !11791

Enable Gitaly by default in GitLab 9.3

Closes gitaly#242

See merge request !11796

Avoid crash when trying to parse string with invalid UTF-8 sequence

See merge request !11770

Don’t create comment on JIRA if link already exists

Closes #25373

See merge request !11485