Load page_specific vue on merge conflict resolver.

app/views/projects/merge_requests/conflicts.html.haml

 - page_title "Merge Conflicts", "#{@merge_request.title} (#{@merge_request.to_reference}", "Merge Requests"
 - content_for :page_specific_javascripts do
+  = page_specific_javascript_tag('generic_bundles/vue_resource.js')
   = page_specific_javascript_tag('merge_conflicts/merge_conflicts_bundle.js')
   = page_specific_javascript_tag('lib/ace.js')
 = render "projects/merge_requests/show/mr_title"