Describe the bug
When a timed theme switch is delayed due to high GPU usage, the old monitoring module logged this incident.
The new module has been rewritten more efficiently and does not yet implement this behavior.

Expected behavior
The new GPU monitoring module logs the GPU usage once after the threshold has been surpassed with a message similar to the old module, e.g

I use the MacOS system,but I don't know how to do it,could you give me a user's guide？

I know terminal.ansiBrightBlack (fg=8) is the default color for auto-suggestions under zsh.

In that case, it would make sense to have it set for a very low contrast. See screenshot, I typed git clone and the git url is auto-suggested.

![screen shot 2019-01-30 at 11 16 49 pm](https://user-images.githubusercont