Revert "Bug 1059482 - Rocketbar app icon overflow r=kgrandon"

This reverts commit 271c527d57c845e0c38b42deed91e8a89a137f1a.

Reverting for incorrect bug listed in commit message. Proper bug is: bug 1059842
Bug 1059842 - Rocketbar app icon overflow r=kgrandon