PermissionError in populate_tree

[csatt]

Hit this just trying to recreate a screenshot for the User Guide update:

Unexpected error: <class 'PermissionError'>
Traceback (most recent call last):
File "/Users/csatt/.pyenv/versions/3.11.2/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/tkinter/init.py", line 1948, in call
return self.func(*args)
^^^^^^^^^^^^^^^^
File "/Users/csatt/GitHub/IV_Swinger/python3/./IV_Swinger2_gui.py", line 3330, in change_folder
self.populate_tree()
File "/Users/csatt/GitHub/IV_Swinger/python3/./IV_Swinger2_gui.py", line 2977, in populate_tree
if not os.listdir(full_path):
^^^^^^^^^^^^^^^^^^^^^
PermissionError: [Errno 1] Operation not permitted: '/Volumes/MY_USB/.Trashes'

Need to catch that exception and skip that directory.