Extract EE specific files/lines for some discussion related project views
We have the following files containing EE specific code. We should move them to ee/
- app/views/projects/blob/_header.html.haml
- app/views/projects/milestones/show.html.haml
- app/views/projects/refs/logs_tree.js.haml
If we use render_if_exists
from https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5767 it would be quite simple to do.