Changes

• Keyboard navigation support in scroll view (@hakimel in #3515)
• Add F1 shortcut for showing help overlay (@gchriz in #3570)

Fixes

• Fix postMessage XSS exploit (@hakimel in 3dade6117628beb7706b4abdc61c268ce281abbc)
• Fix stack backgrounds not working in scroll view (@bouzidanas in #3568)
• Fix fragmentshown and fragmenthidden not firing in scroll view (@bouzidanas, @ hakimel in #3580)

Full Changelog: https://github.com/hakimel/reveal.js/compare/5.0.4...5.0.5