Performance bar overflowing onto menu bar

Summary

The performance bar is overflowing onto the menu bar

Screenshot

Steps to reproduce

1. Enable performance bar
2. Go to a page that has performance warnings (https://gitlab.com/dashboard/todos does this for me)

What is wrong

The ⚠ icon should not be on the menu bar

What should happen

The ⚠ icon should stay on the performance bar

GitLab version

This bug occurs on Gitlab.com (GitLab Enterprise Edition 12.6.0-pre 6f29a39c)