Replace existing images when pasting from clipboard or dropping a new one (fixes #573)

fix batch color correction

Fixed "CodeFormer visibility:" rounding to 2 decimals.

Move scale multiplication to the front

Basic documentation for custom_code.py template

Block event propagation when lightbox is triggered

Fix gallery not scrolling left

Make image gallery bigger on 2k+ displays

image info tab

* Fix process_images where the number of images is not a multiple of (batch_size * n_iter), which would cause us to throw an exception.
* Add a textbox option to Prompts from file (ease of use and it makes it much easier to use on a mobile device)
* Fix the fact that Prompts from file was sometimes passing an empty batch.