(bug 44534) Removing keydown event when stopping edit mode

Change-Id: I66bb419acce8209919ddd9eb77b5c4aadecdb55e
(bug 44641) Preventing keydown event when disabled

Preventing the keydown event on the snakview widget when the widget is disabled.
This will prevent triggering saving when hitting the enter key multiple times.

Change-Id: Iafe8540f69e8869ed3514116c4fb267e29c3d4fa
Merge "(bug 44534) Removing keydown event when stopping edit mode"
Merge "(bug 44641) Preventing keydown event when disabled"