How to stop Inspection messages from popping up on mouseover

I'm finding it increasingly frustrating that I can't move my mouse in a javascript file without popping up dozens of little inspection and intention labels.  I'll declare a variable, only to have my view of the line blocked by a message saying "Unused local variable" that simply won't go away unless I move my mouse (which will likely land on something else that wants to pop up a message).

How do I stop this from happening?  Every other autocomplete action seems to have a "don't show these until I ask for them" or at least a "chill for 1000ms before showing this", but I can't find the analog for inspections.

Anybody know how to do this?