Closes #18432

This uses sassc to compile the application's SASS so it compiles faster.

Without attempting to be very scientific here are some numbers I got:

Using sassc-rails:

```
[1] pry(main)> Benchmark.bm { |bm| bm.report { Rails.application.assets["application.css"] } }
       user     system      total        real
   1.430000   0.380000   1.810000 (  1.830753)
```

Using sass-rails:
```
[1] pry(main)> Benchmark.bm { |bm| bm.report { Rails.application.assets["application.css"] } }
       user     system      total        real
  12.320000   0.530000  12.850000 ( 12.909684)
```

The result is faster page loads when changing CSS in development and
faster precompilation.

Copy <some text> to clipboard

See merge request !8535

Fixes the incoherent filtering by milestone in `/projects/:id/issues` and `/groups/:id/issues` endpoints

Closes #23194

See merge request !8457

Update gitlab-markup back to 1.5.1 in Gemfile

Closes #26627

See merge request !8550

Move dashboard help spinach test to rspec

See merge request !8436

Move dashboard group spinach test to rspec

See merge request !8434

Move dashboard archived projects spinach tests to rspec

See merge request !8431

Move dashboard active tab spinach test to rspec

See merge request !8423

Remove duplicate let in cycle_analytics_spec

See merge request !8422

Move admin users spinach tests to rspec

See merge request !8395

Refactor controller params

See merge request !8522

- Use IssuesFinder for the /issues API resouce
- Tests for iid filter in project issues API resource
- Tests for No Milestone filter in issues API resources
  The "No Milestone" case was not previously tested, and the `/issues`
  resource did not support the the `milestone` parameter.
- Return issues where all labels match from the issues and project issues
  API resources, like the group issues resource already does. See
  https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6825#note_17474533Signed-off-by: Rémy Coutable <remy@rymai.me>

Current filtering for "/projects/:id/issues" endpoint
returns no results for "No Milestone" query.

This PR introduces fix by copying filtering from "/groups/:id/issues"
which works as expected.

Use ReactiveCaching to update external CI status asynchronously

See https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2055

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Fixes pipeline status cell is too wide by adding missing classes in table head cells

Closes #26615

See merge request !8549

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add changelog for search-bar-first-iteration

See merge request !8546

Adds mr id to changelog

Remove redundant parentheses in TodosController spec

[ci skip]

See merge request !8548

Use configured git rather thans system git

See merge request !8460

Do not check for valid url for .gitlab-ci.yml

Closes #22970

See merge request !8451

Fill missing authorized projects rows

Closes #26194

See merge request !8476

Remove more orphans when removing stray namespaces

Closes #25146

See merge request !7841

Scroll to bottom on build completion if autoscroll was active

Closes #26109

See merge request !8391

Search bar first iteration

Closes #21747

See merge request !7345

Add support for PlantUML diagrams in Asciidoc.

Closes #17603

See merge request !8537

Do not remove "autodeploy" directory when fetching CI templates

See merge request !8517

Fix project queued for deletion re-creation tooltip

Closes #17235

See merge request !5393

This MR enables rendering of PlantUML diagrams in Asciidoc documents. To add a
PlantUML diagram all we need is to include a plantuml block like:

```
[plantuml, id="myDiagram", width="100px", height="100px"]
--
bob -> alice : ping
alice -> bob : pong
--
```

The plantuml block is substituted by an HTML img element with *src* pointing to
an external PlantUML server.

This MR also add a PlantUML integration section to the Administrator -> Settings
page to configure the PlantUML rendering service and to enable/disable it.

Closes: #17603

Refactor admin controllers params

See merge request !8521