containers not removed from manager on destroy

[PapaWhiskey65]

title says it all...if you destroy a container it is not removed from the manager, and if you recreate it you get errors...simple fix
UIAbstractContainer.cs line 148 added:

    ITouchable touchable = this as ITouchable;
    if( touchable != null )
    {
        this.__manager.removeFromTouchables(touchable);
    }