Added
- The `set_save_status()` function.
- The `id_tag` option to `action_button_html()`.
- Field number in error messages.
Changed
- Removed redirects after non-standard URL parameters.
- The `add_action()` button behaves more consistently with `.gather()`.
- The `new_window` option to `action_button_html()` can be used to set
the `target` of the hyperlink.
Fixed
- Field trim JavaScript was affecting file variables and triggering an
error.