This replaces some more `@include` rules with their actual CSS
definitions. This is done in preparation for moving to Tailwind CSS,
which won't let us include utilities the same way due to our inability
to support the `@apply` directive.

The `@include` approach was already questioned in the past as it doesn't
have much value over explicit style definitions and just adds an
unnecessary abstraction layer.

Some UI enhancements for displaying custom roles:
- remove custom role aggregation by base access level for role dropdown
- add custom role description for role dropdown, 50 chars limit
- add manage roles link at bottom of role dropdown

Changelog: changed
EE: true

If a pinned nav item was used, the Pinned section will show as
expanded and the item's original section shows as collapsed.

If an item was clicked in its original section, this section shows as
expanded. As before, the pinned section still can show as expanded
because we remember its state seperately in a cookie.

Changelog: changed

- Remove default pre-selection of import target namespace (to first
  available namespace or root namespace). Keep logic around showing last
  import target when a previous import exists.
- Fix code around assumption that namespace is always selected.
- Add validation step that is triggered when "Import" button is clicked.

Changelog: changed

This reverts merge request !143422

Adding released_at to our catalog resources sort options

Changelog: added

Changelog: changed

ShowMlModel has a tab syntax that switches between different views, this
MR improves the UX by setting on the url which tab is open. Users can
now open the page at a specific tab.

Instead of crashing the language switcher componte when the cookie
doesn't contain a `preferred_language`, now it defaults to English.
Defensive programming.

Changelog: changed

Allows user to create a group in an organization from the UI

* The `success` button class is deprecated. We should use `confirm`
  instead: https://design.gitlab.com/components/button#reference
* Delete unnecessary style to display the buttons as block.

EE: true

Changelog: changed

Changelog: changed

This reverts merge request !142554

Changelog: changed

Changelog: fixed

We are adding the ability to fetch the resource readme by version

Changelog: added

Relaxed the popover selector to find also non-anchor elements with the
`.js-user-link` class. This allows to re-enable the popovers on the
`Admin > User` page.

Closes #11290

- Align error location between forms
- Add client side validations
- Add character counter
- Add scrollTo for page level errors

- Add support for handling filter params to client fetchMetric API
- On filters change load metrics with filters

Changelog: fixed

Changelog: changed

Migrates .flex-wrap to .gl-flex-wrap and
.flex-wrap-reverse to .gl-flex-wrap-reverse

Changelog: changed

:Behind work_items_mvc_2 FF

Changelog: fixed

Add footer to role select dropdown in members table and invite modal

Changelog: added
EE: true

And replace with data-testid

Changelog: changed
EE: true