When hovering the icon there is no pointer cursor but clicking does trigger the ULS dialog.
.uls-trigger should have a :hover { cursor: pointer; }
This was likely forgotten because an <a> is used inside, naturally causing a pointer already for (that part) of the trigger. I wonder why there is an <a> in there at all, and why it has an id attribute, but that's another story.
Version: master
Severity: normal