Suggestion: Improved handling of batches in XY plots

[RndUsr123]

Hi, I just wanted to start by thanking you for keeping this alive, it means a lot.

The suggestion I'm submitting is about allowing a batch size of multiple latents to be utilized as an individual cell within plots. This brings several improvements but hardly any drawbacks:

• It enables the creation of 3d plots of sorts, in which you have an X dimension and a Y dimension of choice and then a Z dimension of the latent batch.
• It makes XY plots that already use batch size faster by generating images in parallel; From my testing, batch size 5 is around a 1.5x speedup over batch size 1, without taking the slight delay between generated images into account.
• This can potentially coexist with the already present Seed++ batch, as from what I've seen Comfy generates all images in a batch starting from a single initial seed.

As a practical reference for how I envision the feature, I'd suggest taking a look at the default X/Y/Z plot feature in Automatic1111. Just an example:

[jags111]

okay will check this and update same