No such group yet

Signed-off-by: Takeshi Banse <takebi@laafc.net>
Teach do nothing when `forward-sexp` fails

and remove  redundant `save-excursion`.

Signed-off-by: Takeshi Banse <takebi@laafc.net>
Teach extending the "locking reagion" to a defun if possible

Signed-off-by: Takeshi Banse <takebi@laafc.net>
Teach to add the face property only once

Signed-off-by: Takeshi Banse <takebi@laafc.net>
Formalize; `bqlist-lock-enable' → `enable-bqlist-lock'

Signed-off-by: Takeshi Banse <takebi@laafc.net>