Apply consistent widget method names. Semantic change: Widgets that want to tick when !Visible must override TickOuter() instead of Tick().

OpenRA.Game/Widgets/MapPreviewWidget.cs

@@ -54,7 +54,7 @@ namespace OpenRA.Widgets
 		Rectangle MapRect;
 		float PreviewScale = 0;
 
-		public override void DrawInner()
+		public override void Draw()
 		{
 			var map = Map();
 			if( map == null ) return;