Fatboy unit detach bug + exFac footprint fix

[clyfordv]

Issues:

1. Ordering "deploy" on the Fatboy will detach the unit under construction
2. External factory dummy anchorUnits had a lingering footprint in the blueprint that blocked structure construction (minor, but aesthetically bad)

Fixes:

1. Add a check in the fatboy script to make sure the detaching unit is complete--this could be generalized, but the fatboy is the only unit with this issue, and I believe it also has specific factory attach bone requirements
2. Trim the anchor unit blueprint to remove footprint + additional unnecessary values

Afterthoughts:

1. Anchor dummy unit still necessary to prevent selecting the exFac from the worldview

[Garanas]

Can you turn this into two lines, e.g.:

(#6192) Removes an erroneous structure footprint from the dummy unit of external factories

(#6192) Fix a bug where deploying when building a unit in the external factory would detachg the unit under construction 

This primarily applies to the Fatboy.

That makes it easier to read 😃

[lL1l1]

The unit inside the mobile factory still blocks construction. I guess that's unfixable?

[clyfordv]

I was unaware of that, but I'm guessing it has to do with the build area needing to be free etc. etc. We could chase that goose but I think the return would be minimal, I was mostly worried about the little square popping up (which looked scuffed).