HeightMode, scroll transition, and control element updates
Huge help from @mariano-formidable for this release - Thank you!!
- #632 Dependency vulnerability fixed, upgrade handlebars from 4.1.2 to 4.5.3
- #633 Fixes #618 max (and first) height mode calculations
- #635 Fixes #494 Updates scroll transition logic to fix wraparound flash
- #636 Fixes #503 updates logic so Next button enables/disables correctly
- #638 Fixes #531 styling issue in Demo and some minor cleanup of the code