GitLab

(file): Use widget-file-complete for :completion.  Delete :action.
(symbol): Use lisp-complete-symbol for :completion.
(widget-file-action): Function deleted.
(widget-field-action): Just move to next field.
(widget-choice-action, widget-toggle-action):
Preserve point usefully if it is within the widget.

(group-visibility): Inherit from visibility.