Display group/project access requesters separately in admin
## What does this MR do?
It displays the access requesters in a separate list in group & project members pages.
It also harmonize the members counter UI to use `%span.badge` everywhere (in the admin & non-admin members views).
## Are there points in the code the reviewer needs to double check?
No.
## Why was this MR needed?
To not confuse access requesters with actual members.
## What are the relevant issue numbers?
Closes#18871.
## Screenshots
### Group members
| Before | After |
| --------- | ---- |
|  |  |
### Project members
| Before | After |
| --------- | ---- |
|  |  |
### Admin group members
| Before | After |
| --------- | ---- |
|  |  |
### Admin project members
| Before | After |
| --------- | ---- |
|  |  |
## Does this MR meet the acceptance criteria?
- [x] No CHANGELOG since this is related to the original "request access" MR.
- [ ] 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 you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)
See merge request !4798
+ Move 'Edit Project/Group' out of membership-related partial
+ Show the access request buttons only to logged-in users
+ Put the request access buttons out of in a more visible button
+ Improve the copy in the #remove_member_message helper
Signed-off-by: Rémy Coutable <remy@rymai.me>
Improve ui consistency. Part 2
* Use responsive top-area on project branches and tags pages
* Use default button size in the content list controls
* Improve button margin for btn-grouped css class
For https://gitlab.com/gitlab-org/gitlab-ce/issues/18324
See merge request !4536
Use container helper instead of hard coded container
## What does this MR do?
Add `container_class` helper class to fix layout bug
## What are the relevant issue numbers?
#18333
## Screenshots (if relevant)
Fixed:

Fluid:

See merge request !4543
Redesign navigation for group pages
Part of #14838. This MR targets on desktop version. Mobile version improvements will be in separate merge request
See merge request !3980
Standardize the way we check for and display form errors
- Some views had a "Close" button. We've removed this, because we don't
want users accidentally hiding the validation errors and not knowing
what needs to be fixed.
- Some views used `li`, some used `p`, some used `span`. We've
standardized on `li`.
- Some views only showed the first error. We've standardized on showing
all of them.
- Some views added an `#error_explanation` div, which we've made
standard.
See merge request !3531
- Some views had a "Close" button. We've removed this, because we don't
want users accidentally hiding the validation errors and not knowing
what needs to be fixed.
- Some views used `li`, some used `p`, some used `span`. We've
standardized on `li`.
- Some views only showed the first error. We've standardized on showing
all of them.
- Some views added an `#error_explanation` div, which we've made
standard.
Bring from EE: Share Project with Group
- [x] Models and migrations
- [x] Logic, UI
- [x] Tests
- [x] Documentation
- [x] Share with group lock
- [x] Api feature
- [x] Api docs
- [x] Api tests
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
For #12831
cc @DouweM @rspeicher @vsizov
See merge request !3186