Fixes badges rendering in dark colours on light pages for anyone using GitHub's
"sync with system" theme. Fixes the Options and CSV buttons being unreadable in
the popup in dark mode. The breakdown chips now say they are expandable and
announce their state to screen readers. The popup says when the day's scans are
gone instead of letting you click Scan into a refusal. Scores print as 0.97
rather than a bare 1. Fixes the pull request title not being picked up on
current GitHub pages, so it is scored along with the description again.
Corrects the toolbar icon, which was a build older than the current one.