Fix back-to-top button not appearing at page bottom in Firefox - #15313

Fix back-to-top button not appearing at page bottom in Firefox#15313

cderv wants to merge 2 commits into

quarto-dev:mainquarto-dev/quarto-cli:mainfrom

cderv:fix/back-to-top-bottom-detectioncderv/quarto-cli:fix/back-to-top-bottom-detectionCopy head branch name to clipboard