Only use ampersands within DesktopUI.
Add a couple missing strings.
Alright, triumphant return of the ampersands.

hrydgard wants to use these in the UI later for accelerators,
although that sounds like it'll be messy.
Merge pull request #144 from hrydgard/ampersands

Only use ampersands within DesktopUI (PLEASE READ BEFORE MERGING)