Bug 1006378 - [Stingray] Add selection border support to homescreen-stingray
Merge pull request #19024 from huchengtw-moz/Stingray/Bug_1006378-selection-border

Bug 1006378 - [Stingray] Add selection border support to homescreen-stin..., r=garychen, r=lchang
Bug 1003770 - [Unit test] Unit test for shrinking UI