New Upload System

(Similar to https://support.discord.com/hc/en-us/community/posts/4413613254935-Image-uploading-on-desktop?input_string=New%20Upload%20System)

With the new upload system, I'd like to see an option to toggle between the new and old upload systems. One perk of the old system was being able to individually mass upload files by dragging and dropping multiple files.