* wl-folder.el (toplevel): Bind [(shift return)] to

    * wl-folder.el (toplevel): Bind [(shift return)] to
        wl-folder-jump-to-current-entity-with-arg.
        (wl-folder-jump-to-current-entity-with-arg): Just call with arg
        `wl-folder-jump-to-current-entity'.
        * wl-summary.el (toplevel): Bind `wl-summary-goto-folder-sticky'
        to "G".
        (wl-summary-goto-folder-sticky): Just call with the sticky arg
        `wl-summary-goto-folder'.
        (wl-summary-goto-folder-subr): Add 7th argument force-exit.
        Unless force-exit, do not clean temp. marks for sticky summary.
        (wl-summary-goto-folder): Now the prefix argument means force-exit.