Scrolling in a popup menu causes this occasional crash:
File "/usr/local/lib/python2.7/dist-packages/tingbot_gui/scrollarea.py", line 166, in on_touch
self.start_flick(self.get_velocity(self.last_move[-1],self.last_move[0]))
File "/usr/local/lib/python2.7/dist-packages/tingbot_gui/scrollarea.py", line 66, in get_velocity
return [dx/dt,dy/dt]
ZeroDivisionError: float division by zero
Scrolling in a popup menu causes this occasional crash: