split Widget static bits into Ui static class

OpenRA.Mods.Cnc/Widgets/TooltipContainerWidget.cs

@@ -35,7 +35,7 @@ namespace OpenRA.Mods.Cnc.Widgets
 		public void SetTooltip(string id, WidgetArgs args)
 		{
 			RemoveTooltip();
-			tooltip = Widget.LoadWidget(id, this, new WidgetArgs(args) {{ "tooltipContainer", this }});
+			tooltip = Ui.LoadWidget(id, this, new WidgetArgs(args) {{ "tooltipContainer", this }});
 		}
 
 		public void RemoveTooltip()
@@ -45,7 +45,9 @@ namespace OpenRA.Mods.Cnc.Widgets
 		}
 
 		public override void Draw() { BeforeRender(); }
+
 		public override Rectangle GetEventBounds() { return Rectangle.Empty; }
+
 		public override int2 ChildOrigin
 		{
 			get
@@ -62,6 +64,7 @@ namespace OpenRA.Mods.Cnc.Widgets
 		}
 
 		public override string GetCursor(int2 pos) { return null; }
+
 		public override Widget Clone() { throw new NotImplementedException(); }
 	}
 }