Fix for selection handles.

Selection handles may remain pressed after the power button is pressed.

* The TouchEvent with Interrupt state is not handled.
  Actually Dali core does not send this event when the power button
  is pressed. This patch is a work-around to fix the issue.
  Would be a proper solution send the TouchEvent with the Interrupt
  state when the power button is pressed?

Change-Id: Ide9e69f74eb73f3ed1ce6d0ff918bd1177ba783c
Signed-off-by: Victor Cebollada <v.cebollada@samsung.com>