Model type UI parameters to ui-config.json

[mykeehu]

I noticed that although I have the ui-config.json file, the parameters for the different models (SD, XL, Flux) are hardcoded. It would be useful to export them to the ui-config.json file, because it is inconvenient to use it this way. I almost always generate square images and I was looking for where to set this in the ui-config.json file and couldn't find it, only in the code.