Log Message:
Update devel/py-dialog2 to 3.4.0.

- The Python 2 backport has been updated to this version.
- Add method Dialog.editbox_str(). This is a convenience wrapper around
  Dialog.editbox() that automatically creates and deletes a temporary
  file containing the initial box contents, which is passed as a string
  (Dialog.editbox() needs it in a file).
- Add the week_start common option, mapped to dialog's --week-start
  option (it is useful with the calendar widget). The value may be an
  integer or a string (cf. dialog's manual page for more details).