Changes after review

Fix tooltips in dropdown

* master: (32 commits)
  Update CHANGELOG.md for 8.13.10
  Update CHANGELOG.md for 8.14.5
  Add Wiki import to BB importer
  Make CI badge hitboxes better match container
  Move admin broadcast messages spinach feature to rspec
  Move Admin Appearance spinach feature to rspec
  Fix MR issue to do with merge user
  Check if selected object is valid before passing to calback
  Fix for missing service when importing from EE to CE
  Fix tests because now we don't convert values
  Spaces for literal hash
  updated spec
  Keep the value type for YAML variables
  Test if expanded_environment_name could expand var
  Fix duplicated build token problem and added relevant spec
  Just implement it in the block
  Move admin labels spinach test to rspec
  Bring back "notification-dropdown" class for styling and use "js-notification-dropdown" for JavaScript
  Fix 500 error for invalid path when visiting blame page
  Add sentence casing, fix groups page buttons, fix dark gray variable
  ...

Add Wiki import to BB importer

## What does this MR do?

Adds wiki importing



- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] 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 https://gitlab.com/gitlab-org/gitlab-ce/issues/25819

See merge request !8180

Add LDAP maintenance task

I've received quite a few support requests where a user has renamed their LDAP server in the configuration file. This causes lots of issues where users are suddenly unable to sign in. It's easy enough to fix through the Rails console, but each time I had to instruct users how to get to the Rails console and what to type. This Rake task takes care of this and updates from old to new provider automatically.

Example: `sudo gitlab-rake gitlab:ldap:rename_provider[ldapmain,ldapcustom]`

cc/ @patricio @balameb Do you think this is useful?

See merge request !2181

[ci skip]

[ci skip]

Move Admin Appearance spinach feature to RSpec

Part of #23036

See merge request !8063

Move buttons to project header

Closes #25692    
Before:   
<img src="/uploads/fb65f1ca8021f1669071a3980e5f8258/Screen_Shot_2016-12-14_at_3.52.19_PM.png" width="800px">
After (with Koding setup):   
<img src="/uploads/236e0103186a1b482c4302aa3a4b94b1/Screen_Shot_2016-12-16_at_10.09.53_AM.png" width="800px">
After (without Koding setup):
<img src="/uploads/04bc8360831c98a4c86d3b11ee24826d/Screen_Shot_2016-12-16_at_10.18.35_AM.png" width="800px">


See merge request !8095

Make CI badge hitboxes better match container

## What does this MR do?

Makes the Pipeline graph badge hitboxes accurately match their containers.
Currently, there's an issue where the badge highlights, as though, it's clickable, but clicking it does nothing:

![before](/uploads/668f841c640bc586044c89bed9f1e1e9/before.gif)

This is due to the `<a>` and `<button>` elements being padded into the parent elements. So, the parent would react to a cursor, but the cursor wouldn't be on the `<a>`/`<button>` yet.

![before-hitbox](/uploads/6ebaaa4be1096fbfc37f8d73da492c7b/before-hitbox.png)

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

Maybe the tests? I kept the style changes as minimal as possible.

## Why was this MR needed?

I was annoyed every time I clicked on a badge that I was _clearly on_ (it highlighted), but nothing happened.
If I found it irritating, perhaps someone else did too.

## Screenshots (if relevant)

How it behaves in the PR:
![finished](/uploads/c26fabe37ccf17f171f40b48522702b2/finished.gif)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- Tests
  - [x] All builds are passing
- [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?
Closes #25547 

See merge request !8156

Move admin broadcast messages spinach feature to RSpec

Part of #23036

See merge request !8067

Backport changes from EE to gl_dropdown.js

REF: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/977

See merge request !8165

Convert CI YAML variables keys into strings

So that this would be more consistent with the other variables,
which all of them are string based.

Closes #25554

See merge request !8088

Fix import/export merge requests error

When MWBS is set and the MR exported/imported an error gets thrown. We should ignore this so it can succeed as the merge user may no longer exist in the target instance.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/24009 and https://gitlab.com/gitlab-com/support-forum/issues/1345

See merge request !8134

Fix missing service error importing from EE to CE

Ignores services that are missing in the new instance (EE or even a customised instance), to avoid breaking the import.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/23782

See merge request !8144

Fix 500 error for invalid path when visiting blame page

Closes #25761

See merge request !8145

Bump gitlab-shell to 4.1.1

This fixes a compatibility issue with Git 2.11 (#25301):

- [x] gitlab-shell MR: gitlab-org/gitlab-shell!112
- [x] CE MR: !7967
- [x] EE MR: gitlab-org/gitlab-ee!964

See merge request !8143

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