Fix bug related to filtering Issues by Label/Milestone.

See merge request !3499

Build updates

Fixes #10851 

![build-updates](/uploads/52e09e679ca457f3d818f9a12fd8382b/build-updates.gif)


See merge request !2604

Add endpoints for archiving and unarchiving

Closes #14296

See merge request !3372

Don't fetch any tags from a forked repo

Closes #13957

See merge request !3504

  This problem only was affecting the dev env.

Two level hierarchy  in navigation sidebar
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !3494

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Closes #13957

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Remove 1px whitespace between nav tabs and underline when form present
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !3489

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Notes/discussions header

Part way towards getting the design for issues/merge requests to look more like the design in #3401 - I have standardised the headers for both issues & merge requests comments and discussions.

See merge request !3441

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Added & use Gitlab::Routing for URL helpers

Extracted from !3389

See merge request !3486

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

Memoize reference_pattern/link_reference_pattern

Extracted from !3389

See merge request !3485

spec and fix for fogbugz lonely user problem

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/14766

I encountered this issue while manually testing all import types for
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3066

This is really due to a horrible API

```
{ 'people' => { 'person' => array_of_people_or_single_person_as_hash } }
```

See merge request !3457

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Revert "Merge branch 'users_should_not_be_able_upvote_downvote' into 'master'"

This reverts merge request !3406

See merge request !3491

Allow temp-oauth-email as notification email

Closes #14559 

/cc @dblessing @rymai 

See merge request !3477

This reverts merge request !3406