Backports EE mirror stuck handling feature (https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2628) to CE

JIRA docs update

See merge request !13514

Handle missing .gitmodules when getting submodule urls

See merge request !13509

Display GPG status loading spinner only when Ajax request is made

Closes #35699

See merge request !13526

Remove invalid broadcast messages before migrating

See merge request !13538

Cache the number of forks of a project

See merge request !13535

Add auto-monitoring docs to auto-deploy page

Closes #36398

See merge request !13522

Fix edit merge request button inconsistent letter casing

Closes #34086

See merge request !13548

Speed up Group#user_ids_for_project_authorizations

Closes #36182

See merge request !13508

Move callout to vue file and remove svg from data function to improve performance

See merge request !13539

Docs correct filetree

Closes #36428

See merge request !13545

Update docs with Javascript accord.

See merge request !13440

Repo fixes part E

See merge request !13472

Remove newlines in translations

See merge request !13531

Fix positive raise_error expectation without specifying the error type expected…

Closes #36378

See merge request !13542

delete old doc, update links to the current doc

- correct the file tree
- remove duplicate doc
- move to project/members/
- move images
- update links

Fix positive raise_error expectation without specifying the error type expected in Project::DestroyService specs

Use rspec-parameterized for table-based tests

Closes #35804

See merge request !13469

fix the file tree

Stops propagation for dropdown content in pipeline graph.

Closes #36385

See merge request !13536

Resolve "Make edit comment button always available outside of dropdown"

Closes #34527

See merge request !12931

Add a `Last 7 days` option for Cycle Analytics view

Closes #36300

See merge request !13443

Remove `username` from `User#sanitize_attrs` callback

See merge request !13511

Don't run the `flaky-examples-check` job for docs branches

Closes #36404

See merge request !13525

Use existing BUNDLE_PATH for gitaly in local tests

See merge request !13493

Improve Prometheus docs, include nginx ingress

Closes #36236

See merge request !13438

Refactor how we fetch ref for merge requests

Closes #36089 and #36296

See merge request !13416

Enforce boolean defaults on Application Settings

Closes #2750

See merge request !13144

Fix
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12198#note_37146854

Fix
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12198#note_37147332

Fix
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12198#note_37146815

See https://gitlab.slack.com/archives/C0GQHHPGW/p1501779964878178