0.15.10 Factorissimo2: Map overlays aren't per dimension

[kosievdmerwe]

When you are inside a factory you still see the overlays from the outer world and vice versa.

Steps to repro:
1. Install Factorissimo2
2. Build a factory
3. Draw an X using power poles
4. Open map in overworld
5. Turn on electric networks
6. Notice the X is drawn in the center of the overworld

[Rseding91]

This should be fixed in 0.15.11 and later.