Ensure overlay visibility checkbox is updated on state load

[bnmajor]

Fixes #1552

[psavery]

This looks like it works, but emitting this signal might have other side effects like regenerating overlays (the signal is primarily intended to communicate that overlays need to be regenerated).

Could we instead try adding self.materials_panel.update_gui_from_config() to here?

[bnmajor]

Could we instead try adding self.materials_panel.update_gui_from_config() to here?

Sure thing.

[psavery]

Could we instead try adding self.materials_panel.update_gui_from_config() to here?

Sure thing.

That needs to be changed to self.materials_panel.update_gui_from_config(). Can you also verify that fixes the issue?

[bnmajor]

That needs to be changed to self.materials_panel.update_gui_from_config(). Can you also verify that fixes the issue?

I'm sorry, I read your original comment too fast. This is fixed now and that does work.

[psavery]

That needs to be changed to self.materials_panel.update_gui_from_config(). Can you also verify that fixes the issue?

I'm sorry, I read your original comment too fast. This is fixed now and that does work.

Great! I think this makes more sense too, since updating the GUI is what we are really doing.

[psavery]

LGTM