Close a group started with BeginVertical.

	// Create a Vertical Compound Button 
	
	class BeginEndVerticalExample extends EditorWindow {
	
		@MenuItem("Examples/Begin-End Vertical usage")
		static function Init() {
			var window = GetWindow(BeginEndVerticalExample);
			window.Show();
		}
		
		function OnGUI() {
			var r : Rect = EditorGUILayout.BeginVertical("Button");
				if (GUI.Button(r, GUIContent.none))
					Debug.Log("Go here");
				GUILayout.Label("I'm inside the button");
				GUILayout.Label("So am I");	
			EditorGUILayout.EndVertical();
		}
	}