am bb52543c: Merge "Show undo option for 3 seconds after the last picture is deleted." into jb-dev

* commit 'bb52543c6ba40749d7046f6ea9da4a8b30793f8d':
  Show undo option for 3 seconds after the last picture is deleted.
tree: 0abee0febfc3c716a878f5fab9f8da7d55bb1a9b
  1. gallerycommon/
  2. src/
  3. src_pd/
  4. tests/