Follow-up from "Draft: Add badge to Contribution Analytics header when using ClickHouse"

GitLab adds some clever stuff to GlPopover to make it JustWork in a bunch of files.

This change prevents the title field being populated, and unnecessary space rendered, if there is no title.

Before	After

The following discussion from !144683 (merged) should be addressed:

• @danmh started a discussion:

  polish(non-blocking): It looks like there is space being rendered for the popover title, when there is none. I think I can see how to fix this and contribute a fix in a separate branch 😊