Comment 3 for bug 1566201

I've sorted out the UPDATE but that led to yet another one:

Traceback (most recent call last):
  File "/home/bdmurray/source-trees/apturl/trunk/AptUrl/gtk/backend/InstallBackendAptdaemon.py", line 83, in _on_finished
    True, result, None, None)
  File "/usr/lib/python3/dist-packages/UpdateManager/backend/__init__.py", line 80, in _action_done
    self.window_main.start_available(is_cancelled_update)
TypeError: <lambda>() takes 0 positional arguments but 1 was given

Just removing "is_cancelled_update" ends up presenting a dialog box about installing adobe flash that has unclickable buttons.