only half of the diff is correct (the window opening).
lots of lines looks like nk's experimentations and obviously do not cleanup
anything nor make the thing works:
* print 'show', name
* self.filterstr = 'account'
* print 'refilter starts'
* print self.filterstr
* self.modelfilter.refilter() #FIXME: does not work!
the position of the button is probably not the final position.
modify config to support boolean value embedded in string because the treestore
store/edit all value with a string.