Fix menubar icon background on Yosemite.
Fix menubar icon background on Yosemite.

xhacker/quark-shell-mac,baxrob/quark-shell-mac,HackPlan/quark-shell-mac,baxrob/quark-shell-mac,xhacker/quark-shell-mac,HackPlan/quark-shell-mac,xhacker/quark-shell-mac,baxrob/quark-shell-mac