Update defaultHtmlStepUi.js 'Press save to see changes -> Press apply to see changes'

[pomyo]

Fixes #[Add issue number here.]

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[tech4GT]

This looks good! Thanks for your contribution! This looks ready to merge! 🎉

[jywarren]

Great! Merging. And @tech4GT you can feel free to merge things too! 👍

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