Currently the StartPageOptionsModal renders when you add a new post/page, but also when you remove all the content on a page. This makes for a disorienting experience, as a modal pops up out unexpectedly.

I think the modal should only render when creating a new page.

If any content has been added to the page, then removed, the StartPageOptionsModal should not render again.

If we want to still provide a mechanism for users to view the modal, we can add a snackbar notification "Choose a starter pattern." that renders in this scenario (after content has been added and the content is removed) which provides an action "View patterns" for viewing the starter patterns.

Current experience

I delete the last top-level block on my page and the modal pops up unexpectedly.