(set_find_now_sensitive): New.
(entry_changed_cb): Always make the "Find Now" button and menu
item sensitive here.
(emit_search_activated): ...And here, always insensitive.
(setup_standard_verbs): Always start up insensitive.
(activate_button_clicked_cb): Make the entry grab the focus.
(clear_button_clicked_cb): Likewise.
svn path=/trunk/; revision=17348