Allow requesting too-heavy items from other platforms

[PFQNiet]

I've built an orbital station whose purpose is to pre-fetch building materials and intermediates from the planet and make them available to passing cargo ships. However I noticed (just in time!) that if I were to have this orbital station request materials for a rocket silo and then build it, I could not then request it on another platform because:

> This item weight (10 tons) exceeds the rocket capacity (1 ton)

I haven't actually checked if inter-platform cargo pods are subject to weight limits or use the 10-stack capacity of drop pods, but I would certainly like to be able to pre-build silos and request them on demand, rather than requesting the materials and assembling it elsewhere.