Adder occluded for certain gh views - z-index issue?

[dwhly]

When trying to annotate a gh draft the modal is over top of the adder.

[robertknight]

Does using the "a" / "h" keys to annotate still work?

[dwhly]

Yes.

[mkdir-washington-edu]

I can reproduce:

1. Go to https://github.com/orgs/hypothesis/projects/120/views/1
2. Click on a single issue so it opens
3. Activate Hypothesis
4. Highlight the repo name and issue number at the top of the issue
5. The Adder is hidden behind the issue:

There are some strange z-indices on this page, but I can't tell if they apply to the popped out issue or not.

[acelaya]

I can confirm this is a z-index issue. The element rendered over the adder has z-index: 10 (one of its parents, actually), while the adder has z-index: 3. Increasing it to something >10 fixes it.