Fixes last remaining lints and enables scss-lint test for GitLab CI.
With this, builds will now fail if they break the SCSS style guide (at least, the parts enabled by the linter).
Discussed in #14299 (closed).
cc: @rspeicher @jschatz1
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
With this, builds will now fail if they break the SCSS style guide (at least, the parts enabled by the linter).
Discussed in #14299 (closed).
cc: @rspeicher @jschatz1