my %dispatch = (
                add => {
                        confirm => {
                                commit  => \&commit_dialog,
                                default => \&confirm_dialog,
                        },
                        default => \&update_dialog,
                },
                remove => {
                        confirm => {
                                commit  => \&commit_dialog,
                                default => \&confirm_dialog,
                        },
                        default => \&choose_dialog,
                },