glib: Re-organize code in Source for better readability
glib: Re-organize code in Source for better readability

Move stuff around to have them in a reasonable order: fields, then
constructors, then destructor, then static methods, then instance stuff.
Also remove a commented out method, which would not be correct anyway.

No real code change here, just cosmetic changes.

openmedicus/gtk-sharp,openmedicus/gtk-sharp,akrisiun/gtk-sharp,sillsdev/gtk-sharp,akrisiun/gtk-sharp,orion75/gtk-sharp,openmedicus/gtk-sharp,sillsdev/gtk-sharp,akrisiun/gtk-sharp,openmedicus/gtk-sharp,sillsdev/gtk-sharp,orion75/gtk-sharp,antoniusriha/gtk-sharp,sillsdev/gtk-sharp,openmedicus/gtk-sharp,orion75/gtk-sharp,akrisiun/gtk-sharp,orion75/gtk-sharp,sillsdev/gtk-sharp,orion75/gtk-sharp,openmedicus/gtk-sharp,akrisiun/gtk-sharp,openmedicus/gtk-sharp,antoniusriha/gtk-sharp,antoniusriha/gtk-sharp,antoniusriha/gtk-sharp,antoniusriha/gtk-sharp