As outlined in https://github.com/WordPress/gutenberg/issues/42257 we need to add a block appender to the Navigation List View to allow users to add more items to their navigation: <img width="237" alt="Screenshot 2022-11-01 at 11 37 21" src="https://user-images.githubusercontent.com/275961/199225387-18491337-b2d1-43cf-8c4c-19d6469741ce.png"> This will probably require us fixing this issue at some point: https://github.com/WordPress/gutenberg/issues/18295
