Fixed comit avatar alignment

## What does this MR do?

Fixes the alignment of the avatar on https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG

Also fixes potential issues in other places.

## Screenshots (if relevant)

![Screen_Shot_2016-06-27_at_10.58.26](/uploads/fa4f50cfc30a870422d1afa63a4331d1/Screen_Shot_2016-06-27_at_10.58.26.png)![Screen_Shot_2016-06-27_at_10.58.35](/uploads/bd7dc3cf77464c1775fabb45b8079f02/Screen_Shot_2016-06-27_at_10.58.35.png)

See merge request !4933