.gitignore line hover pop-ups?! (popup)

I'm looking at a .gitignore file in a project, and when my mouse inadvertantly hovers over a line, a pop-up shows up, which I don't really need and is annoying.

However, I'm not finding the setting to disable this...

I'm OK with having a box pop-up on demand, not automatically... and I'd be OK with a little hint icon or something, out of the way, on hover, indicating I can activate a quick-info pop-up box, but that doesn't appear to have been implemented, so I'm stuck with this obscuring box if I'm not paying careful attention to my mouse cursor (which I shouldn't have to do often while hovering).

Note: PHPStorm Settings misspell "pop-up" as "popup"... I'm not finding normal usage of "popup" anywhere else, so I may have missed other posts about this.