Merge branch 'new-mr-commit-alignment' into 'master'

Fixed avatar alignment in new MR view

## What does this MR do?

Fixes the alignment of the avatar in the new MR compare view

## Screenshots (if relevant)

![Screen_Shot_2016-07-05_at_16.17.54](/uploads/9c427f66f8ef1d5ecee627e57ee61322/Screen_Shot_2016-07-05_at_16.17.54.png)

See merge request !5095

app/assets/stylesheets/pages/merge_requests.scss

@@ -167,7 +167,8 @@
 
   .commit {
     margin: 0;
-    padding: 2px 0;
+    padding-top: 2px;
+    padding-bottom: 2px;
     list-style: none;
     &:hover {
       background: none;