Signed-off-by: NTakuya Noguchi <takninnovationresearch@gmail.com>

Part of single codebase changes.

Stop using `Rails.env.test?` in views.

Failing due to updates in capybara and selenium driver.

This is for fixing a regression introduced by:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24969

This fix will allow users who are allowed to push to protected
branches to create protected branches via CLI as well, just
like before. The checks for protected branch creation won't
need to run.

This commit includes changes to add `UserAccess#can_create_branch?`
which will check whether the user is allowed to create a branch even
if it matches a protected branch.

This is used in `Gitlab::Checks::BranchCheck` when the branch name
matches a protected branch.

A `push_to_create_protected_branch` ability in `ProjectPolicy` has been
added to allow Developers and above to create protected branches.

This is to match `git branch -D <branchname>`

Replaces .card-header > hX.card-title with hX.card-header to remove
.card-title. At a occurrence where bold styling is not necessary,
div.card-header is used instead.
By full removal of .card-title at the moment, all workarounds for
BS4's card-title are removed as well.

More information: https://getbootstrap.com/docs/4.0/migration/#panelsSigned-off-by: NTakuya Noguchi <takninnovationresearch@gmail.com>

Rename btn-new, btn-create and btn-save to btn-success
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

Add missing QA selectors as well

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

Remove duplicate ee code

This was generalized for usage in the new variable table design, see
https://gitlab.com/gitlab-org/gitlab-ce/issues/39118#note_53615249

Conflicts:
	app/assets/stylesheets/pages/projects.scss
	ee/app/assets/javascripts/protected_branches/protected_branch_create.js
	ee/app/assets/javascripts/protected_tags/protected_tag_create.js
	ee/app/views/projects/protected_branches/ee/_dropdown.html.haml