Fix a couple of nits

OpenRA.Game/Widgets/ColorBlockWidget.cs

@@ -47,6 +47,7 @@ namespace OpenRA.Widgets
 		public override void DrawInner(World world)
 		{
 			WidgetUtils.FillRectWithColor(RenderBounds, GetColor());
+			Game.chrome.lineRenderer.Flush();
 		}
 	}
 }

OpenRA.Game/Widgets/Widget.cs

@@ -192,7 +192,7 @@ namespace OpenRA.Widgets
 				return false;
 			
 			// Send the event to the deepest children first and bubble up if unhandled
-			foreach (var child in Children)
+			foreach (var child in Children.OfType<Widget>().Reverse())
 				if (child.HandleMouseInputOuter(mi))
 					return true;