Add `before_process_batch` script callback

update "replace preview" link button's css

Gradio auth logic fix - Handle empty/newlines

Xyz order fix

sort upscalers by name

add: /sdapi/v1/scripts in API

modify css
`.extra-network-thumbs .card:hover .additional a` 's value from `block` to `inline-block`.
So, extensions can add more buttons to extra network's thumbnail card.

save images to correct directories

Allow saving of images generated via API

Add scaled dot product attention

feat: auto update all extensions using flag

Implement UniPC sampler

Suggested change by @akx
Co-authored-by: Aarni Koskela <akx@iki.fi>

use lowercase name for sorting; keep `UpscalerLanczos` and `UpscalerNearest` at the start of the list with `UpscalerNone`
Co-authored-by: catboxanon <122327233+catboxanon@users.noreply.github.com>

API for get scripts list

When the massive one-liner was split into multiple lines, it lost the ability to handle newlines. This removes empty strings & newline characters from the logins. It also closes the file so it's more robust if the garbage collection function is ever changed.