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It's like bilinear but with slerp.

"node_errors" contains a dict keyed by node ids. The contents are a message
and a list of dependent outputs.

exponential scheduler is the one recommended with this sampler.

It now scales the textarea positioning using the canvas height/width.

* wip

* latent dir

* fix

* fix

* now working

* mark todo

* remove server.py changes to separate PRt

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Co-authored-by: Lt.Dr.Data <lt.dr.data@gmail.com>