remove gdialogs
make 'make dist' happy
Bump version to 1.7.0
Fix datadir
Use correct gtk version for GDK_BACKEND_X11 check
Bump version to 1.7.1
Fix build with GTK3
Sync translations with transifex
Remove old GTK_REQUIRED, it moved into case.
Fix autoconf warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body