Comment 1 for bug 1489989

I'm still getting this bug on 0.65:

This is zim 0.65
Platform: posix
Locale: pt_BR UTF-8
FS encoding: UTF-8
Python: (2, 7, 11, 'final', 0)
Gtk: (2, 24, 29)
Pygtk: (2, 24, 0)
Zim revision is:
  branch: zim-trunk
  revision: 805 <email address hidden>
  date: 2015-11-01 15:42:45 +0100

======= Traceback =======
  File "/usr/lib/python2.7/site-packages/zim/actions.py", line 109, in func
    self.func(instance, *arg, **kwarg)
  File "/usr/lib/python2.7/site-packages/zim/plugins/linesorter.py", line 57, in sort_selected_lines
    MessageDialog(self.ui,
AttributeError: 'MainWindowExtension' object has no attribute 'ui'