* lisp/simple.el (completion-list-mode-map): Use choose-completion for the
mouse binding as well.
(completion-list-mode, completion-setup-function): Adjust docstring and
echo area message accordingly.
* lisp/progmodes/idlwave.el (idlwave-choose-completion): Adjust to new
calling convention of choose-completion.
* lisp/comint.el (comint-dynamic-list-completions):
* lisp/term.el (term-dynamic-list-completions): Accept choose-completion.