Use modals in field re-use flow

I think it will be easier to keep track of this issue if we make it a child of 🌱 [Plan] Improve field creation experience Active .

In #3346682-7: Improve re-use an existing field user experience → , @laurii wrote,

We want to move the field config form into a modal dialog but we should do that consistently for all instances where that form is being accessed as part of ✨ Use modals on the Manage Fields page Needs work .

Maybe the right place to discuss the related issues (scope of each and which comes next) is on the Plan issue.