Refactor MPS PyTorch fixes, add fix still required for PyTorch nightly builds back

Apparently I did not test with large enough images to trigger the bug with torch.narrow on MPS

disable EMA weights for instructpix2pix model, whcih should get memory usage as well as image quality to what it was before d2ac95fa

make it so that setting options in pasted infotext (like Clip Skip and ENSD) do not get applied directly and instead are added as temporary overrides

Fixes thumbnail cards not loading the preview image

Reduce grid rows if larger than number of images available

When a set number of grid rows is specified in settings, then it leads
to situations where an entire row in the grid is empty.
The most noticable example is the processing preview when the row count
is set to 2, where it shows the preview just fine but with a black
rectangle under it.

Fixes X/Y/Z Plot parameters not being restored from images