Bug 931092 - add styling specifically for widgets, r=mconley
Bug 873626 - Adjust height of navbar to 40px per Australis specs; r=jaws
Bug 873626 - Followup: Adjust height of navbar to 40px per Australis specs on Linux. r=me
merge ux to holly
Backout changesets be920ff7556b, 4c2d984c2094, and 1ff54a14fbb7.