Resolve "URL is created falsely including trailing special characters"

Closes #1676 (closed)

I think it might be a little difficult to maintain our own regex that works for all cases. I tried a few different ones, but none of them seemed to work with all our cases, also we should actually write tests to ensure this won't break when making changes. In the end, I thought it is probably easiest to just use a package for this. linkifyjs seems quite good, and has React support for replacing the links.