Fix cancel button on issuables

Fixes #14671

See merge request !3417

Upgrade web-console to 2.3.0

Rails 5 compatibility release.

[See the Changelog for more information](https://github.com/rails/web-console/releases/tag/v2.3.0).

Working towards #14286.

See merge request !3400

Upgrade font-awesome-rails to 4.5.0.1

Includes Rails 5 support.

[See Changelog for details](https://github.com/bokmann/font-awesome-rails/releases/tag/v4.5.0.1).

Working towards #14286.

See merge request !3399

Upgrade Brakeman from 3.1.4 to 3.2.1

Includes support for Rails 5, bug fixes, and various additional vulnerability checks.

[See Changelog for more information](https://github.com/presidentbeef/brakeman/blob/master/CHANGES).

Working towards #14286.

See merge request !3397

Upgrade Teaspoon from 1.0.1 to 1.1.5.

Includes compatibility with Rails 5.

See the changelog for more information (https://github.com/modeset/teaspoon/blob/master/CHANGELOG.md).

Working towards #14286.

See merge request !3409

Upgrade Bullet to 5.0.0

Includes Rails 5 support.

[See changelog for details](https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md).

Working towards #14286.

See merge request !3396

Fix typos in webhooks docs



See merge request !3416

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/14660

Don't attempt to look up an avatar in repo if repo directory does not exist

Relates to https://sentry.gitlap.com/gitlab/gitlabcom/issues/3507/

Closes #14580



See merge request !3390

Fuzzy search dropdown UI element min-width (issue 14644)

Short project names sometimes result in an unusable fuzzy search UI element. Therefore, I added a min-width CSS property with a value of 175px.

See here for details but it's fairly straight forward:
https://gitlab.com/gitlab-org/gitlab-ce/issues/14644

Before:
<br />
![Screen_Shot_2016-03-25_at_20.03.54](/uploads/2bdc048bd818cdcd228bb2d19a10b5d2/Screen_Shot_2016-03-25_at_20.03.54.png)

After:
<br />
![Screen_Shot_2016-03-25_at_20.19.29](/uploads/be23938757f67ffebb96c9bdc8229c5b/Screen_Shot_2016-03-25_at_20.19.29.png)

See merge request !3407

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

Remove release docs from the CE repository

More detailed, updated, and accurate versions of these docs now live in
https://gitlab.com/gitlab-org/release-tools

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/2346

[ci skip]

See merge request !3393

Add links to CI setup documentation from project settings and builds pages

For #14483 
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !3384

Includes compatibility with Rails 5.

See the changelog for more information (https://github.com/modeset/teaspoon/blob/master/CHANGELOG.md).

short project names result in unusable fuzz search UI elements, so added a min-width property to the css

Added a space between property colon and value to satisfy linter and pass build.

Fix link colors after recent UI refactoring

cc @jschatz1 

See merge request !3404

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>

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

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

Closes #14580

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

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

Clarify LFS configuration

A user on Twitter was confused (rightfully so) because LFS admin docs suggest you must set a storage path. In fact, Omnibus defaults to a very sane location. Add a comment to the snippet outlining the default.

See merge request !3388

Includes support for Rails 5, bug fixes, and various additional
vulnerability checks.

See Changelog for more information
(https://github.com/presidentbeef/brakeman/blob/master/CHANGES)

Rails 5 compatibility release.

See the Changelog for more information:
https://github.com/rails/web-console/releases/tag/v2.3.0

Includes Rails 5 support.

See changelog for details:
https://github.com/bokmann/font-awesome-rails/releases/tag/v4.5.0.1