Rotate non maximized windows

Rotate non maximized windows

There are two types of rotation to be considered:
1. Rotation of native widgets
The corresponding window should be rotated and resized proportionally to the
new screen geometry.

2. Rotation of toplevel windows.
The window will be only rotated. It will be only moved or resized if it
becomes clipped, in order to be fitted on the screen properly.

Change-Id: Ice92427ac07a9bea284e68917ff3e0f436722bc0
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>