* master: (114 commits)
  Remove dashboard.scss
  Update custom_hooks.md for global custom hooks and chained hook info
  Move admin hooks spinach to rspec
  Move admin logs spinach test to rspec
  Fix 404 error when visit group label edit page
  A simpler implementation of finding a merge request
  Encourage bug reporters to mention if they use GitLab.com
  Bump gitlab-shell version to 4.0.3
  Remove confirmation.scss
  Explain "js: true" in "deleted_source_branch_spec.rb"
  Move award emojis to framwork
  Move image styles to framework
  Remove tags.scss
  Remove caching of Repository#has_visible_content?
  Add text example for pipeline status without action
  Use detailed status as CSS class in pipelines list
  Use status text when redering pipelines list
  Improve support for icons in new detailed statuses
  Add status label information to pipeline header
  Untangle status label and text in ci status helper
  ...

Bump Git version requirement to 2.8.4

Following gitlab-org/omnibus-gitlab!1108, the install doc and README should be updated too.

See merge request !7878

Bump gitlab-shell version to 4.0.3

See merge request !7953

Move admin hooks spinach to RSpec

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

See merge request !7942

Move admin logs spinach test to RSpec

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

See merge request !7945

UX Guide - add initial animation guidance

Adding guidance to our UX Guide around animation. This is to help us implement #24831 and add polished, consistent animation throughout GitLab.

See merge request !7780

Use :maximum instead of :within for length validators with a 0..N range

Closes #25209

See merge request !7894

Update php.md - /.dockerinit was removed in v1.11 so the test always results in …

See merge request !7882

Add excoveralls in list of coverage examples

See merge request !7906

Update custom_hooks.md for chained hooks support

See merge request !6721

Fix 404 error when visit group label edit page

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/25158

See merge request !7957

Remove caching of Repository#has_visible_content?

This MR removes the caching of `Repository#has_visible_content?`. The cache for this method is no longer necessary and this should solve the problem described in https://gitlab.com/gitlab-org/gitlab-ce/issues/25278.

See merge request !7947

A simpler implementation of finding a merge request

## What does this MR do?

This cleans up some code in the issues API as discussed in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7180#note_19501743

The helper method `merge_request_for_resolving_discussions` was no longer needed as it was only used once. That made it possible to simplify the implementation.

## Does this MR meet the acceptance criteria?

- [x] ~~[Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added~~
- [x] ~~[Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)~~
- [x] ~~API support added~~
- Tests
  - [x] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

!7180

See merge request !7955

Remove more pages css

* Moves award emojis to `/framework`
* Moves generic image styles to `/framework`
* Removes `confirmation.scss`

See merge request !7952

Remove dashboard.scss

See merge request !7960

# Conflicts:
#   app/assets/stylesheets/framework.scss

Remove tags.scss

Remove `tags.scss`

See merge request !7935

Remove admin.scss

Removes admin-specific CSS

See merge request !7932

https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/93

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

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

Following a discussion in !7180

Encourage bug reporters to mention if they use GitLab.com [ci skip]

See merge request !7954