Say you are displaying a value:
But you then want to edit it:
There is already a Read Only property, but it just makes the box uneditable. What I would like is to have it look like a display value and then click the pencil and then the UI changes to a normal edit box.
Thank you for posting this, Brad! 
Also, as a quick note, the creators of the Designing in Retool slide deck will be talking about it on December 9, 2022.
https://app.livestorm.co/retool/retool-community-meetup-designing-in-retool?type=detailed
Could be interesting / relevant 
