I use following config, but does not work. How can I manage those popup 
buffers with display-buffer-alist?


    (add-to-list 'display-buffer-alist
                  '("^\\*Org Agenda\\*" (display-buffer-same-window)))

    (add-to-list 'display-buffer-alist
                  '("^\\*Clock Task Select\\*"
    (display-buffer-below-selected)))