Marcel Taeumel uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-mt.899.mcz

==================== Summary ====================

Name: System-mt.899
Author: mt
Time: 16 August 2016, 5:32:49.455602 pm
UUID: b5a60ed5-772c-6c46-acf3-2715023ed220
Ancestors: System-mt.898

Fixes additional dependency by moving some window color-related methods to System extension.

=============== Diff against System-mt.898 ===============

Item was added:
+ ----- Method: Model>>defaultWindowColor (in category '*System-preferences') -----
+ defaultWindowColor
+ 
+ 	^ self uniformWindowColor!

Item was added:
+ ----- Method: Model>>uniformWindowColor (in category '*System-preferences') -----
+ uniformWindowColor
+ 
+ 	^ self userInterfaceTheme uniformWindowColor ifNil: [Color veryVeryLightGray]!

Item was added:
+ ----- Method: Model>>windowColorToUse (in category '*System-preferences') -----
+ windowColorToUse
+ 
+ 	^ Color colorFrom: (self class useColorfulWindows
+ 		ifTrue: [self userInterfaceTheme customWindowColor ifNil: [self defaultWindowColor]]
+ 		ifFalse: [self uniformWindowColor])!

Item was added:
+ ----- Method: StringHolder>>defaultWindowColor (in category '*System-preferences') -----
+ defaultWindowColor
+ 	^ (Color r: 0.9 g: 0.9 b: 0.719)!