Lengthy Powerbox requests cannot be read in full

On TTRSS, I have been getting a Powerbox prompt that looks like this:

Hovering over it does nothing, which is how I expected I would see the rest of the URL. Luckily, I was able to find which feed was requesting it as well as the full URL in the debug log, since TTRSS and Ian's proxy both log things effectively there. But this isn't a great pattern, especially when the actual domain is off the end of the view entirely.

I think this should either be a multiline display (preferably), or show the full URL on hover.