Width and height scaling is broken about boarder

[lindlof]

The scale is saved when the image settings dialog is opened. Only that scale is remembered and used.

Should checking the box save a new scale? Yes, especially since returning to the original size is as easy as clicking a button now.

[lindlof]

commit bf8f017
Author: Mikael Lindlöf [email protected]
Date: Thu Jun 14 21:05:27 2012 +0300

Image width and height scale is recalculated every time the scaling checkbox is checked.