main: Mark g_set_application_name for translation
According to https://developer.gnome.org/glib/stable/glib-Miscellaneous-Utility-Functions.html#g-set-application-name, it should be marked for translation.
According to https://developer.gnome.org/glib/stable/glib-Miscellaneous-Utility-Functions.html#g-set-application-name, it should be marked for translation.