Merge pull request #6 from webOS-ports/tofe/work

Fixes for the destruction of a window, either from compositor's side or ...
Merge pull request #8 from webOS-ports/tofe/work

Tofe/work: Destroy window fix and minor esthetical changes
ScreenShooter: add a screenshot capability on swipe-to-right on Gesture Area.

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>