error out with a readable message in chwewckpoint merger for incompatible tensor shapes (ie when trying to merge SD1.5 with SD2.0)

New grid option in settings enables adding of image numbers on grids. This makes identifying the images, especially in larger batches, much easier.

Revert "Adding image numbers on grids"

This reverts commit 3530c283b4b1d3a3cab40efbffe4cf2697938b6f.

Implements Callback for image grid loop

Necessary to make "Add image's number to its picture in the grid" extension possible.

change karras scheduler sigmas to values recommended by SD from old 0.1 to 10 with an option to revert to old

fix 'RuntimeError: Expected all tensors to be on the same device' error preventing models from loading on lowvram/medvram.

make save to zip into its own button instead of a checkbox

make it so that memory/embeddings info is displayed in a separate UI element from generation parameters, and is preserved when you change the displayed infotext by clicking on gallery images

changed embedding accepted shape detection to use existing code and support the new alt-diffusion model, and reformatted messages a bit #6149

set sd_model for API later, inside the lock, to prevent multiple requests with different models ending up with incorrect results #5877 #6012