Updated: Comment #0
includes putting the "Place block" form into a modal.
However, when you add the code to make a link trigger a modal, the form will not submit.
And if you hack the submit button to submit, then the modal will not close.
And if you do those two things properly, your form will no longer work in a non-modal context.
Make forms reusable as modal forms, improve DX of modal-ifying a form.
Find the way to do that.
User interface changes