Disabling "New Footprint" switch throws error when no Footprint library selected

[eeintech]

Version: beta1

Traceback

Traceback (most recent call last):
  File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.10/threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "./Ki-nTree/kintree/gui/views/common.py", line 235, in <lambda>
    lambda e: self.process_change(e, handler, *args, **kwargs)
  File "./Ki-nTree/kintree/gui/views/common.py", line 208, in process_change
    handler(e, *args, **kwargs)
  File "./Ki-nTree/kintree/gui/views/main.py", line 870, in create_footprint
    self.update_footprint_options(self.fields['Footprint Library'].value)
  File "./Ki-nTree/kintree/gui/views/main.py", line 804, in update_footprint_options
    footprint_lib_path = footprint_paths[library]
KeyError: None