Replaces CSS with BS4 Utility classes

Uses new gold trial helper method to
render a gold trial callout on user dashboards.

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8731

This reverts commit 427c1e72, reversing
changes made to 5aac64a7.

Show a dismissable callout on a users dashboard for a free trial of
the GitLab.com Gold plan. Hide the callout from users who have
dismissed the callout, are already on a trial or are already on the
gold plan

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

This reverts merge request !21551

Jan Provaznik authored 6 years ago and Winnie Hellmann committed 6 years ago

When listing issues and merge requests on dasboard page,
make sure that at least one filter is enabled.

User's id is used in search autocomplete widget instead
of username, which allows presetting user in filter dropdowns.

Related to #43246

Closes #36459

`breadcrumb_title` is then overriden when needed

fixed eslint failures
fixed project select dropdown not working on some pages

'New issue'/'New merge request' dropdowns should show only projects with issues/merge requests feature enabled

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>

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>

move all sidebars to one side for improved UX; add button in head of projects/issues and milestones instead of tab on side of screen to prevent overlapping of content

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