SmrPlanetType: tweak structure costs
SmrPlanetType: tweak structure costs

Weapon Mount: 500k -> 300k
Radar Station: 3M -> 1M

smrealms/smr,hemberger/smr,hemberger/smr,hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr