Tidied up a lot of the WPF

[Pyritie]

Tidied up a lot of the WPF to use grids so the window is resizable and the code is more maintainable!

Changed some things to use more bindings instead of changing properties of UI controls directly. Changed some of the settings to use menu item checkboxes instead of putting a combo box inside a menu. (I think this should be done for the language selection as well)

I do a lot of WPF at work :p so I wanted to tidy it up a bit