Switched off automatic form scaling. Was causing some display problems on some screens. Furthermore scaling wasn't working as expected on screens other than 96 pixels per inch, so we're loosing little by switching it off.
Fixes bugs #3591818 (http://bit.ly/TvNaUL) "Strange window behaviour in WIndows 7" and bug #3591820 (http://bit.ly/SEH6dO) "Incorrect font size used for some bold text" for v4.0 maintenance branch.
