Merge ModRuleset and MapRuleset into Ruleset

OpenRA.Game/Widgets/ButtonWidget.cs

@@ -55,10 +55,10 @@ namespace OpenRA.Widgets
 		public Action OnDoubleClick = () => {}; 
 		public Action<KeyInput> OnKeyPress = _ => {};
 
-		readonly MapRuleset rules;
+		readonly Ruleset rules;
 
 		[ObjectCreator.UseCtor]
-		public ButtonWidget(MapRuleset rules)
+		public ButtonWidget(Ruleset rules)
 		{
 			this.rules = rules;
 

OpenRA.Game/Widgets/CheckboxWidget.cs

@@ -25,7 +25,7 @@ namespace OpenRA.Widgets
 		public bool HasPressedState = ChromeMetrics.Get<bool>("CheckboxPressedState");
 
 		[ObjectCreator.UseCtor]
-		public CheckboxWidget(MapRuleset rules)
+		public CheckboxWidget(Ruleset rules)
 			: base(rules)
 		{
 			GetCheckType = () => CheckType;

OpenRA.Game/Widgets/DropDownButtonWidget.cs

@@ -22,7 +22,7 @@ namespace OpenRA.Widgets
 		MaskWidget fullscreenMask;
 
 		[ObjectCreator.UseCtor]
-		public DropDownButtonWidget(MapRuleset rules)
+		public DropDownButtonWidget(Ruleset rules)
 			: base(rules) { }
 
 		protected DropDownButtonWidget(DropDownButtonWidget widget)	: base(widget) { }

OpenRA.Game/Widgets/ScrollItemWidget.cs

@@ -20,7 +20,7 @@ namespace OpenRA.Widgets
 		public string BaseName = "scrollitem";
 
 		[ObjectCreator.UseCtor]
-		public ScrollItemWidget(MapRuleset rules)
+		public ScrollItemWidget(Ruleset rules)
 			: base(rules)
 		{
 			IsVisible = () => false;