bug 898256 - Use new 1.5x assets from UX for shared style. r=basiclines
Merge pull request #11695 from mpizza/Bug_898256_hd

uplift from master branch -- 442ba712682b4d5caa3dfc122ce7678fd1f4a9e6
bug 898256 - Use new 1.5x assets from UX for shared style. r=basiclines