With this approach it would be easier to add different sources of
configuration, that we do not necessairly have to be in YAML format.

As for now, we keep this class inside a oryginal config processor class.
We will move implementation to this class and delegate to it from
current config processor.

After original gitlab ci yaml processor not longer has relevant
impelemntation we will replace it with new configuration class.

See merge request https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4431

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>

Add icons and buttons to UI guide

cc @jschatz1 @skyruler 

See merge request !4445

Fix import error handling

Fixes https://gitlab.com/gitlab-com/support-forum/issues/745

This improves import error handling:
- Now if there's an error during importing before the job is scheduled, we also mark the project status as failed.
- Refactored setting the status to failed into one single method.
- Fixed some situations where the error message was missing or simply empty.

See merge request !4366

See merge request !4436

Add tooltips to todo target links



See merge request !4370

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

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

This will be useful when you want to ask for the 
number of items and later iterate over them, without 
needing to ask if the association is load or not.

So you avoid extra database queries

[ci skip]

Fixes missing number on generated ordered list

Closes #18102 

See merge request !4437

Reduce number of fog gem dependencies

Currently supported:

* AWS
* Azure
* OpenStack
* Google
* local storage

Closes #15352

See merge request !4396

Cache project build count. Closes #18032

See merge request !4377

Move feature specs for shortcuts to valid directory

This MR moves tests to valid directory that matches our namespace we use in code.

See merge request !4433

Cache assigned issue and merge request count. Closes #18036 and #18035

See merge request !4378

Clicking search pill focuses field

When clicking the pill in the search field, it now focus the field. Previously you would have to make sure you click in the field.

Fixed an issue where clicking out of the field wouldn't remove the focus
outline

Also reduced some of the HTML to remove what isn't needed

See merge request !4279

Fix serious performance bug with rendering Markdown with InlineDiffFilter

Nokogiri's `node.replace` was being unnecessarily called for every text node in
the document due to a comparison bug. The code previously was comparing the
HTML representation of the full document against the text node, which would
always fail. Fix the comparison to just compare the modified text.

Closes #18011 


See merge request !4392