Personal roboports should assign jobs based on proximity, or personal construction area should be configurable

[nzer]

Bots in personal roboports are currently extremely inefficient due to the pseudorandom way jobs are assigned. It doesn't matter for a static roboport, but with a personal roboport the player could move themself throughout the build to optimize bot travel time if jobs were assigned by proximity.

Being able to lower the construction range would also accomplish this. 50 robots building in a 10x10 square will, in practice, build as quickly as the player can run. 50 robots building in a 50x50 square, by comparison, is extremely slow and wastes a ton of energy, because the bots will be traveling several times as far for each job on average. This creates an awkward tension as well, where adding more personal roboports is not anywhere near as beneficial as it should be due to the expansion of the construction area. I even suspect, though I haven't verified it, that after a certain level of bot speed adding more roboports actually hurts build times rather than improves them.