Use QtQuick.Window 2.2

Use version 2.2 in the documentation and for the .qmltypes file.

The revision for properties got dropped in commit 7ceca6ac

 , and
is now dropped from the .qmltypes file, too. The removed signals
are also dropped because of that (because they are implicitly
declared by the property, anyway).

Change-Id: Ia14dd403ce1f098cb378bd7940e8f80f32b770a0
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>