(load_branch): Ignore an undefined map name.

(load_branch): Ignore an undefined map name.
(load_im_info): Set im_info->title from `name' only if it's not
Mnil.
(shift_state): Always update ic->status.
(adjust_candidates): Renamed from adjust_candidate_command.
Argument changed.  Caller changed.
(get_candidate_list, regularize_action): New functions.
(take_action_list): Use them.  On handling Munhandle, don't set
ic_info->used to 0.
(handle_key): If KEY is not handled by MAP, and MAP has
branch_actions, perform them.