Fix back-to-top button not appearing at page bottom in Firefox - #15314

Fix back-to-top button not appearing at page bottom in Firefox#15314

cderv merged 3 commits into

mainquarto-dev/quarto-cli:mainfrom

fix/back-to-top-bottom-detectionquarto-dev/quarto-cli:fix/back-to-top-bottom-detectionCopy head branch name to clipboard