[Bug 1.81] Can create overlapping slots using blueprints

[Shakespeare]

Steps:

1. Start a new game
2. Press B to enter blueprint mode. Place a slot in the middle of the floor, say “Fit Body”
3. Press B again to exit blueprint mode. Now place a real slot that partially overlaps the blueprint.
4. Left click on the exposed part of the blueprint and click “buy”

Expected:

• No overlapping slots

Observed:

• Overlap and some space savings