Added three new modes: pass through, pick first n, pick last n

[ech3lon24]

I added three new modes to the very awesome preview-chooser node. I made these because they were useful for my workflows.

Pass through:

• Does not pause the execution
• Simply passes on all images and latents from the inputs to the outputs Main use case:
• When using multiple preview-chooser nodes in our workflow, we are able to select and pause only specific ones.
• We are still able to preview and restart any generated images later on (even from the pass through nodes)
• When constructing complex modular workflows, place preview-chooser nodes in front of each module. This allows us to restart the execution of each module without restarting the entire workflow.

Pick first n:

• Does not pause the execution
• Automatically picks the first n images and latents and passes them on to the outputs
• n is specified via the new count field and the default is 1 Main use case:
• Allows us to select images automatically when we know they will be first in the batch (e.g. computed Masks)

Pick last n:

• Does not pause the execution
• Automatically picks the last n images and latents and passes them on to the outputs
• n is specified via the new count field and the default is 1 Main use case:
• Allows us to select images automatically when we know they will be last in the batch (e.g. computed Masks)

[ech3lon24]

Nice clean change.

Just one request: in L64 could you express the condition in a way that avoids the if (A or B and C) form, so anyone who reads the code doesn't need to think about precedence rules for logical operators...

Even if it's just by using brackets - if ( (A or B) and C ) - I think it improves code maintainability...

Agreed. It should be more readable now.

[chrisgoringe]

thanks. nice addition.