Moves keyboard focus to this EditorWindow.

	// Simple Editor Window that when clicked focuses another window.
	//
	// Usage: Open both windows (Window 1 and Window 2) and just press the button
	// to see how the focus changes
	class Window1 extends EditorWindow {
	
		static var instance;
	
		@MenuItem("Example/Show Focus Usage/Window1")
		static function Init() {
			var window = EditorWindow.GetWindow(Window1);
		}
	
		function Window1() {
			instance = this;
		}
		
		function OnGUI() {
			if(GUILayout.Button("Focus the other window!")) {
				Window2.instance.Focus();
			}
		}
	}

	// Simple Editor Window that when clicked focuses another window.
	//
	// Usage: Open both windows (Window 1 and Window 2) and just press the button
	// to see how the focus changes
	
	class Window2 extends EditorWindow {
		
		static var instance;
		
		@MenuItem("Example/Show Focus Usage/Window2")
		static function Init() {
			var window = EditorWindow.GetWindow(Window2);
		}
		
		function Window2() {
			instance = this;
		}
		
		function OnGUI() {
			if(GUILayout.Button("Focus the other window!")) {
				Window1.instance.Focus();
			}
		}
	}