Fix: 500 error returned if destroy request without HTTP referer

[ci skip]

Fix CI badge

The previous code relied on having on ref stored in commit, however the ref was moved to the build.

Fixes #3104

See merge request !1690

Fix visibility of specific runners

See merge request !1688

The previous code relied on having on ref stored in commit, however the ref was moved to the build.

Add migration to remove the contents of the satellites dir

See merge request !1681

Fix some grammatical issues

Ci status for merge requests index page

![ci-mr-index](/uploads/1424564c87ac6ff5fb2c4bc260fbebdf/ci-mr-index.png)


See merge request !1682

[ci skip]

Add missing character

This adds the missing character `a` to the help-text

Added missing period in gitlab_flow article.

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>

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

Add "Copy to clipboard" buttons

See #2855

See merge request !1494

Use git follow flag for commits page when retrieve history for file or directory

This can be really helpful when you want commit history for file that was moved recently
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1680

Fix CI regressions

This MR fixes a couple of small CI regressions
- Allow developer to manage builds
- On CI Admin page show only projects that are present in GitLab
- On Runner CI Admin page show only projects that are present in GitLab
- Refresh build log only when status changes
- Show the oldest builds on top when viewing Builds - it most cases it shows running builds on top
- Fix Lint rendering
- Fix number of other builds in build widget

Fixes #3164

Fixes #3161 

Fixes gitlab-org/gitlab-ci#343

See merge request !1679

Adds buttons to the commit list SHAs and the cross-project reference
data on issuables.

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

Fix cloning Wiki repositories via HTTP

Cloning a project Wiki over HTTP would end up cloning the main repository
since the .wiki extension was being stripped.

Closes #3106

See merge request !1676

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