Map Tree
Basically what we have now with the indoor true/false thing. But this would be cool for friendlists etc.
A map can be a parent or a child, e.g. you're in Onett wandering around, the friendlist shows your location as Onett once you go inside a building the map name changes to e.g. McFronalds but there's a ton of McFronalds allover the world, so this particular map can have Onett as its parent map, and in the friendlist it would show the player's map's parent map so the person looking at the friendlist sees that the other guy is walking around in the city of Onett.
Not sure if you want this in by default but just a suggestion.
Also:
When placing a wall at the top of a map, the movecursor is outside the screen so you can't move the wall anymore. And you can only enlarge walls to the right and down, could you add it so you can drag it left and up as well?
shouldnt be too hard to implement that.
the map id would be something like [3,2,1]
(Onett = 3; McFronalds = 2; 1. floor = 1)
well there are more than enough ways to do this, and I can promise you that my example there is the simplest and most inefficient 
I post the most embarrising questions here
Thanks for all your nice replies (I know I would be annoyed by myself slightly )
3 levels might be a bit much, I think 2 levels would be good [City] > [House]
We'll add this in SVO so if no one has done it before us we'll probably throw it on the wiki.
Yeah, sorry, definitely won't add into the base engine.
For the move box, fixed.