Bug 1019124 - Use HDPI assets for Canvas Debugger. r=bgrins,vporof
Bug 1018809 - Use SVG icon for devtools dropmarker icon. r=bgrins
Bug 1019217 - Use HDPI asset for Web Audio editor sidebar icon. r=bgrins
Bug 1006461 - Fix handling of permission notifications in preference dialogs. r=florian