deleting message crashes gui

[lepmik]

Traceback (most recent call last):
  File "/home/mikkel/apps/expipe-dev/expipe-browser/expipebrowser/main.py", line 225, in processReadyRead
    self._partial_message = parse_event_stream(message, self.processEvent)
  File "/home/mikkel/apps/expipe-dev/expipe-browser/expipebrowser/main.py", line 88, in parse_event_stream
    process_event(event_name, event_data)
  File "/home/mikkel/apps/expipe-dev/expipe-browser/expipebrowser/main.py", line 206, in processEvent
    self.process_put(path, data)
  File "/home/mikkel/apps/expipe-dev/expipe-browser/expipebrowser/main.py", line 161, in process_put
    self.set_nested(path, data)
  File "/home/mikkel/apps/expipe-dev/expipe-browser/expipebrowser/main.py", line 313, in set_nested
    del(dic[idx])
KeyError: 3
Aborted (core dumped)

[dragly]

Works fine here