Remove more cruft from Game.controller

OpenRA.Game/Widgets/BuildPaletteWidget.cs

@@ -387,7 +387,7 @@ namespace OpenRA.Widgets
 
 			Sound.Play(unit.Traits.Contains<BuildingInfo>() ? eva.BuildingSelectAudio : eva.UnitSelectAudio);
 			Game.IssueOrder(Order.StartProduction(world.LocalPlayer, item, 
-				Game.controller.GetModifiers().HasModifier(Modifiers.Shift) ? 5 : 1));
+				Game.GetModifierKeys().HasModifier(Modifiers.Shift) ? 5 : 1));
 		}
 
 		static Dictionary<string, string> CategoryNameRemaps = new Dictionary<string, string>

OpenRA.Game/Widgets/DefaultInputControllerWidget.cs

@@ -82,7 +82,7 @@ namespace OpenRA.Widgets
 				{
 					Location = pos,
 					Button = MouseButton.Right,
-					Modifiers = Game.controller.GetModifiers()
+					Modifiers = Game.GetModifierKeys()
 				};
 
 				return Game.controller.orderGenerator.GetCursor( world, Game.viewport.ViewToWorld(mi).ToInt2(), mi );

OpenRA.Game/Widgets/RadarBinWidget.cs

@@ -71,7 +71,7 @@ namespace OpenRA.Widgets
 			{
 				Location = loc,
 				Button = MouseButton.Right,
-				Modifiers = Game.controller.GetModifiers()
+				Modifiers = Game.GetModifierKeys()
 			};
 
 			var cursor = Game.controller.orderGenerator.GetCursor( world, loc, mi );