Moves loadscreens into LoadScreens folder/namespace.

Moves LoadWidgetAtGameStart to Traits/World.

OpenRA.Mods.Common/LoadScreens/NullLoadScreen.cs

@@ -0,0 +1,36 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.LoadScreens
+{
+	public class NullLoadScreen : ILoadScreen
+	{
+		public void Init(Manifest m, Dictionary<string, string> info) {}
+
+		public void Display()
+		{
+			if (Game.Renderer == null)
+				return;
+
+			// Draw a black screen
+			Game.Renderer.BeginFrame(int2.Zero, 1f);
+			Game.Renderer.EndFrame( new NullInputHandler() );
+		}
+
+		public void StartGame()
+		{
+			Ui.ResetAll();
+		}
+	}
+}
+