Jittery list rendering when moving mouse up and down recent releases

[matthagan15]

I've noticed some pretty bad jitter when simply scrolling through recent releases, it appears as if the list items below the currently hovered item are resized and when moving mouse up and down somewhat fast (normal usage) it causes a jitter. Not sure how to include videos on github issues but I could include one if someone tells me the proper way.

[syphar]

I video would be really helpful, purely from the description I can't reproduce the issue.

[jsha]

I can reproduce reliably. Steps to reproduce:

1. Visit https://docs.rs/releases/search?query=tea-wasm (as an example of a results page where crate names are truncated)
2. Hover over the crate name for the first result.

Expected result:

Results do not move around.

Actual result: full crate name is shown, and wraps within its cell. This causes the first result to get taller, pushing down the result below.

The problem gets worse when looking at results pages for which many of the crate names are truncated.

[Nemo157]

Also occurs on long descriptions, which can sometimes be very long. A medium long example is https://docs.rs/releases/search?query=fst-bin.