Resize skipped icon

Resizes `skipped` icon to match all other status icons
![Screen_Shot_2016-11-10_at_7.35.07_AM](/uploads/5be0dc0638f12a3c984af747a03ce1e1/Screen_Shot_2016-11-10_at_7.35.07_AM.png)


Closes #24353

See merge request !7401

Fix no "Register" tab if ldap auth is enabled (#24038)

Closes #24038

See merge request !7274

Resolves divider issue in group setting dropdown

## What does this MR do?
This MR resolves the issue #24048 
##  Are there points in the code the reviewer needs to double check?
NR
## Why was this MR needed?
This MR removes extra divider from group setting dropdown when there is only one entry to show. This improves UX
## Screenshots (if relevant)

**Before**
![dd-before](/uploads/b4696b610a921a710c6be74fbb212260/dd-before.png)

**After**
![Screen_Shot_2016-11-10_at_4.09.36_PM](/uploads/a4ff6efe92ce60837afad079398c3880/Screen_Shot_2016-11-10_at_4.09.36_PM.png)

## 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] 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)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #24048

See merge request !7398

This commit is dedicated to GuilhemB, thanks for supporting me on Tipeee
:-)

Make toggle pipeline btn into button element

Toggle pipeline graph button was a `div` instead of a `button` ☹

See merge request !7404

Grapify triggers API

## What are the relevant issue numbers?

Related to #22928

See merge request !7378

Fix error when using invalid branch name when creating a new pipeline

## What does this MR do?

This MR fixes `500` error when creating a new pipeline though user interface ("Run pipeline")

## Are there points in the code the reviewer needs to double check?

Is this a good approach to catch those exceptions on `Repository` level?

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- Tests
  - [x] Added for this feature/bug

## What are the relevant issue numbers?

Closes #23982

See merge request !7324

Fix cache for commit status in commits list to respect branches

Fix cache for commit status in commits list to respect branches

Closes #24324

See merge request !7372

Use 'Forking in progress' title when appropriate

See merge request !7394

Resolve "Improve ee_compat_check task (part 3)"

Improve the `ee_compat_check` task with caching and keep artifacts on failure.

Closes #23945.

See merge request !7177

Import University training preso slides

## What does this MR do?

Adds missing training material from University.

## What are the relevant issue numbers?

Closes #23502

See merge request !7016

Grapify milestones API

## What are the relevant issue numbers?

Related to #22928

See merge request !7373

Grapify runners API

## What are the relevant issue numbers?

Related to #22928

See merge request !7377

Grapify the session API

## What are the relevant issue numbers?

Related to #22928

See merge request !7381

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

Add api endpoint `/groups/owned`

See merge request !7103

[ci skip]

Remove order-dependent expectation

Fixes #24341, hopefully

See merge request !7385

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

Add more highlighting to development docs

Now that docs.gitlab.com has lovely highlighting, we should make sure we use it
everywhere it makes sense!

See merge request !7369