When using haunt mode, extra scrollbars appear when hovering over the "Preview" icon and triggering the Tooltip. To reproduce:
- Master (HEAD)
- Enable Haunt mode by hitting `Z` or clicking the pin icon in the comment toolbar
- Hover mouse over preview icon
- Entire haunt mode div jumps repeatedly (Chrome, Mac, Desktop)
FWIW, I can't duplicate this on a laptop. T10687 is still likely the //root// issue, but maybe there s a div we can `overflow: hidden` here.