Fix UI loading hack

[TGrade]

Fixes an error
"Cannot read properties of undefined (reading 'querySelectorAll')" During loading process.

I don't know how it was before 1.6.x update, but currently there is only 1 element returned by the selector. Taking 0 one seems to be fixes the issue.

---

Generation works, but there is an error in console while loading networks

ERROR:    Exception in ASGI application
OverflowError: int too big to convert
TypeError: Integer exceeds 64-bit range

This error happens when it tries to load data using this url: http://127.0.0.1:7860/cozy-nest/extra_networks/full
Not sure about this one. Probably some api change?

[TGrade]

Ok nvm. Networks error was due to some metadata having a number 2 times bigger than int 64 like stated in this comment
#188 (comment)