This commit is the result of running `yarn eslint --fix` after enabling
the `no-implicit-coercion` ESLint rule. This rule has been added to
our ESLint config here:
https://gitlab.com/gitlab-org/gitlab-eslint-config/merge_requests/14
Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/39608
Use SVG icons to avoid having to position things
See https://gitlab.com/gitlab-org/gitlab-ce/issues/39608#note_50088917