Errors in font size conversion in the DELTA Editor

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Open the image settings dialog, save changes.
2. Re-open the image settings dialog.

What is the expected output? What do you see instead?
Expect the fonts to remain as set, however the font size increases on each 
save/restore cycle.  This is due to a DPI correction factor being applied to 
the restore but not the save.

Please use labels and text to provide additional information.

Original issue reported on code.google.com by [email protected] on 5 Dec 2012 at 12:54