Fix the commit search UI

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/1765

app/views/search/_results.html.haml

@@ -11,7 +11,7 @@
   .results.prepend-top-10
     - if @scope == 'commits'
-      %ul.list-unstyled
+      %ul.content-list.commit-list.table-list.table-wide
         = render partial: "search/results/commit", collection: @search_objects
     - else
       .search-results

changelogs/unreleased/commit-search-ui-fix.yml

+---
+title: Fixed commit search UI
+merge_request:
+author: