Done, updated in the demo and github.
There is a 'Show' button in the zone view, grid tab.
This will allow you to display a grid and manipulate its points without an NPC selected.
The points will still show up in the side so you should be able to jump to them in the view and edit them independent of a connected NPC.
It is a very hasty change, so let me know if you find any unusual behavior.
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