language-chooser-dialog: do not talk about response IDs
language-chooser-dialog: do not talk about response IDs

It's better to not talk about them at all. gedit still needs to use
GTK_RESPONSE_HELP because using a positive value puts the button on the
right side of the dialog, but it's better to have it on the left,
separated from the other buttons (without an headerbar).

GNOME/gspell,GNOME/gspell