* e-search-bar.c (update_sensitivity): New halper function to
update the sensitivity of the commands.
(entry_changed_cb): New callback to make the activate_button and
the "Find Now" verb sensitive only if the entry has some contents.
(activate_by_subitems): Connect the callback here.
(setup_standard_verbs): Call update_sensitivity() here.
svn path=/trunk/; revision=16199
1657404cf7