Popup for ctx in html reports is finicky

[rpkilby]

Describe the bug
For HTML reports, the popup for the new "Who Tests What" ctx element can be a bit finicky. If you attempt to mouse over the popup box (e.g., to copy the list of test names), the popup will close, as you are no longer hovering over the ctx element. If you move the mouse quickly, you may be able to hover over the popup before it disappears, but this is unreliable and annoying.

Video
https://i.imgur.com/Zsgb3AA.mp4
The report was built using coverage v5.0a8

Expected behavior
I should be able to reliably mouse over the ctx popup so I can copy the list of test functions.
One possible solution: clicking the ctx element could pin/unpin its popup. Clicking another ctx would close all other popups.

[nedbat]

You are right, it's not good the way it is now. I'll try to improve it.

[rpkilby]

Thanks, and I'm really looking forward to the 5.0 release. The context feature is great.

[nedbat]

I did a big refactor of how the HTML report markup is structured, as of a58a8ab. Give it a try.

[rpkilby]

The context expansion works great. Not sure if it's related to the changes, but there's a rendering issue with partially covered lines.

[nedbat]

Oops, forgot to check the two together. Fixed in 168f1e7. Thanks for the quick feedback! :)

[rpkilby]

Of course. Thanks again.

[nedbat]

This finished version of this is available in 5.0b1: https://pypi.org/project/coverage/5.0b1/