Theme share and view in browser icons

Change-Id: I7effb205d641b9acd1cc2bc093da15f6b6b1d4a3
Fix up arrow navigation NPE

When using up navigation to go back from the change
 detail screen, a new intent is sent with null for the action.

Change-Id: Ie56f9fa444f95ed90c4cb79b307fef8082389125