"/editbase 1" did indeed work from inside the TARDIS. I assume it launches the base editor from wherever you are in the base including if you happen to be stuck in a police box 🙂
We have a police box/TARDIS base item on top of our portal. When zoning in (from a base portal, or using the Base TP power), I am getting trapped in the box. This is regardless of camera position, character, hovering or on the ground. "/stuck" only shifts me around inside the box, I can't jump out.