Error when passing painter_func

[Everzen]

Hi Johnny,

I have recorded a quick 1min 30 second video demonstrating what I think might be a bug when passing the painter function when you have setup the nodegraph to work with a vertical layout. You can catch the video here

I am really sorry if I am misunderstanding something. If I am, just say so and I will go away and figure it out, but I think it might be an issue with the definition of the inputs of the add_input method of the NodeItemVertical class, which might be missing the new "locked" input when compared to the NodeItem Class, which is causing my code to fall over. The details are demoed in the video. Really sorry if this is a waste of time!

Thanks again for the awesome code. We love it!

All the best,

Rich