Multi limpet controllers should be limited to one per ship

[chennin]

This build is not legal: https://coriolis.io/outfit/cobramkv?code=A0peteFSledjsef41717-------47---xAxA-3x3w4F.Iw18RQ%3D%3D.Aw18RQ%3D%3D..EweloBhBGA2EoFMCGBzANokMK4fiIA%3D%3D

because multi limpet controllers are limited to one per ship. The game does not let you, and for comparison, neither does EDSY.

Desired state: Like other unique modules (e.g. GFSD Booster), we should not be able to have more than 1 multi limpet controller on a ship. Adding a second should delete the older one.