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

OpenRA.Game/Widgets/ChatDisplayWidget.cs

@@ -33,7 +33,7 @@ namespace OpenRA.Widgets
 			: base(widget) { }
 
 		public override Rectangle EventBounds { get { return Rectangle.Empty; } }
-		public override void DrawInner()
+		public override void Draw()
 		{
 			var pos = RenderOrigin;
 			var chatLogArea = new Rectangle(pos.X, pos.Y, Bounds.Width, Bounds.Height);