macOS and related paths fixes

[Neradoc]

Hi !
I tested running on mac, so here are a few fixes that came from that.

• On macOS the drives are in /Volumes, and since it doesn't make sense to change it on mac, I just hard coded the path and ignored unix_drive_mount_point.
• Fixes circuitpython_only for mac and linux. Now correctly only lists board drives if the checkbox is not checked.
• Fixed an issue with shutil.rmtree choking on extended attributes files on a board, like when a module was installed manually.
• Ignore hidden .* files in the device's installed libs (like macOS extended attributes).
• Sort the modules in modules.list_modules() so the list is consistent across uses. Avoids deleting the wrong one in GUI.uninstall_module() because it was not sorted there but was in the UI. Is there a way to get the selected module name from the UI ?

[UnsignedArduino]

Hey thanks for the PR - really appreciate it 😃

Is there a way to get the selected module name from the UI ?

What do you mean by this? Can you elaborate, please?

[UnsignedArduino]

All looks good! 👍

[Neradoc]

Is there a way to get the selected module name from the UI ?

What do you mean by this? Can you elaborate, please?

The current code retrieves the position of the currently selected line, and gets the name by using that on the list gotten from list_modules(). But list_modules retrieves the list from disk every time, so if a file was added or removed in the meantime for example, the list of files would not match the UI, the index would point to a different file (or be out of bounds), and the wrong file would be deleted. It's an edge case but better safe than sorry.

I don't know that UI framework, but if it's possible to get the selected module name back from installed_modules_listbox_var or something, it would guarantee that it is the exact one that was selected, no mater what changed underneath. That or caching the value of list_modules() in another variable, to make sure it matches the UI.

[UnsignedArduino]

Should be fixed: 949fef9
Shows an error message when I try to delete a non-existent module. Thanks for reporting that edge case 👍