Make the minimum window height 480

Made more controls able to scale down
- color swatch
- tumble control
- default button height

PartPreviewWindow/View3D/ColorSwatchSelector.cs

@@ -91,8 +91,8 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			var colorWidget = new GuiWidget()
 			{
 				BackgroundColor = color,
-				Width = buttonSize,
-				Height = buttonSize,
+				Width = buttonSize * GuiWidget.DeviceScale,
+				Height = buttonSize * GuiWidget.DeviceScale,
 				Margin = buttonSpacing
 			};
 

PartPreviewWindow/View3D/TumbleCubeControl.cs

@@ -54,7 +54,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 		Vector2 lastMovePosition;
 
 		public TumbleCubeControl(InteractionLayer interactionLayer)
-			: base(100, 100)
+			: base(100 * GuiWidget.DeviceScale, 100 * GuiWidget.DeviceScale)
 		{
 			this.interactionLayer = interactionLayer;