Order by dropdown in filter section of list page is broken in tablet layouts
Summary
Order by dropdown in every listing page has misalignment chevron icon and missing left margin when page is viewed in tablet screen size.
CSS responsible for this code seems to be introduced in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9280 but back then, we used Bootstrap 3. This broke likely in Bootstrap 4.
Main culprit seems to be the block present at app/assets/stylesheets/framework/filters.scss#L368
.