Bump to 2.12.45, as 2.12.44 was taken by a stray windows msi
Bump to 2.12.45, as 2.12.44 was taken by a stray windows msi

sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp