Allow all extensions for upload

Continuing the discussion from Ima by BT:

I was trying to upload an MP3, but it wasn’t on the allowed list:

select images or files from your device (jpg, jpeg, png, gif, pdf, mp4, webm, txt, md, csv, json, ttf, svg)

So I configured it to allow all file extensions. That will help with .mp3, .flac, .opus, .sav, .gcm


Also, don’t download files from untrusted sources ever.