MoonLight Add-In now works also with MD3+(NRefactory)

I was playing around with XAML and saw that MoonLight Add-In is not working at all after MD3 switched to NRefactory. To better understand MD, XAML and NRefactory i decided to fix MoonLight Add-In. I'm pushing this because maybe someone still work with MoonLight but he is forced to use MD2.8 with this commit he will be able to do it with MD3+.