Summary

SUMMARY: Bugfixes "Disallow dragging all other grid furniture"

Purpose of change

So snezhniylis on the discord discovered an issue with dragging grid furniture, first noticed with space heaters:

Aside from whatever causes this, a JSON update for this also makes sense on the basis of all of the grid furniture being stuff that's plugged or wired into the grid, and you would logically want to unplug it before moving it around. Most grid furniture follows this logic already barring some exceptions.

Describe the solution

Set it so that foodco kitchen buddies, fridges, freezers, and space heaters have a required_str of minus one, preventing you from dragging them around.

Describe alternatives you've considered

Digging through the code, trying to find why this dupe happens, focusing on that instead of a quickfix that renders it a non-issue for now and probably screaming at C++ yet again.

Testing

1. Checked affect file for syntax and lint errors.
2. Tested dragging around one of the furniture that inherits from another, to confirm that inheriting required strength actually works.

Additional context