Fix strings not localising

[artehe]

Use a different textblock and just show or hide it as necessary so that it will reload the localised string properly.

Resolve #235

[Plootie]

Just curious. Would it be worth using the StringConverters.IsNullOrEmpty for the visibility over doing it in the viewmodel? Either way works good so just reminding ya it exists if you wanna use it. If not all good to merge!

[artehe]

Just curious. Would it be worth using the StringConverters.IsNullOrEmpty for the visibility over doing it in the viewmodel? Either way works good so just reminding ya it exists if you wanna use it. If not all good to merge!

I knew I was doing something stupid, was literally thinking like I'm not doing this right. I shall sort it.