Hyperlink tooltips are flaky, don't always appear

> One more random data point in case someone finds it useful: I seem to be in an in-between world where sometimes it works and sometimes it doesn't. It seems that if I move the mouse in from the left side of the screen on the same line as the link, I usually get no tooltip. If the mouse comes from the bottom (or otherwise goes over _non_-link text) before hitting the link, I do get the tooltip. Even coming from the left, I still get it maybe 10% of the time (estimated).
>
> _from @zb140_

Start by reproducing the intermittent hyperlink-tooltip behavior described in the issue, especially when the pointer enters from the left versus from non-link text. Then locate the Windows Terminal code responsible for hyperlink hover handling; done means the tooltip appears reliably when hovering a hyperlink.

Written by the indexing model from the issue text.