Refactor & deduplicate web UI boot code

Preserve Python 3.9 compatibility

add lora hashes to infotext
when pasting infotext, use infotext's lora hashes to find local loras for <lora:xxx:1> entries whose hashes match loras the user has

Test overhaul

More Eslint fixes

Add .git-blame-ignore-revs

rewrite uiElementIsVisible

split out the visibility method for pasting and use a sort inside the paste handler to prioritize on-screen fields rather than targeting ONLY on screen fields

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

Spel chek changelog some

change upscalers to download models into user-specified directory (from commandline args) rather than the default models/<...>