Add polish to updated adaptive interaction.
Merge branch 'bug-890061-fxos-adaptive-updates' of https://github.com/mozilla/bedrock into bug-890061-fxos-adaptive-updates
Merge branch 'bug-890061-fxos-adaptive-updates' of https://github.com/mozilla/bedrock into bug-890061-fxos-adaptive-updates
revert scroll top timeout