Always show merge status

Always show the merge status of a merge request, even if the user has no
permission to do the actual merging.

Fixes
http://feedback.gitlab.com/forums/176466-general/suggestions/5673321-everyone-should-be-able-to-see-a-mr-status

app/views/projects/merge_requests/show/_mr_accept.html.haml

@@ -4,7 +4,10 @@
       %strong Archived projects cannot be committed to!
   - else
     .bs-callout
-      %strong You don't have permission to merge this MR
+      .automerge_widget.cannot_be_merged.hide
+        %strong This can't be merged automatically, even if it could be merged you don't have the permission to do so.
+      .automerge_widget.can_be_merged.hide
+        %strong This can be merged automatically but you don't have the permission to do so.
 
 
 - if @show_merge_controls