Fixes positioning issues for the admin area

Resolves #461. Works towards resolving #462
Resolves #462 - admin menu background

I'm assuming something is going wrong with the load order due to z-index
applied to other elements, I'm not entirely sure though.
Better solution for #462 - admin column background
Send to post process fixed

Resolves #463
Prep for bugfix release.
Changelog fixes.
Merge pull request #464 from PressForward/3.5.x

3.4.4 bugfixes for display and nominate area.