Fixed Reported Bugs

Fixed issues reported by users.

Issues resolved:
- Selecting a green house then deselecting it caused it to become a opaque white color. Now returns to its previous transparent appearance.
- User were able to stack buildings on top of one another. Increased box colliders so stacking buildings is not possible, although this could be an interesting component I will consider later.
- Rock collector box collider was interacting on opposite side of the supply area. Fixed the box collider positioning.
- Purchasing dormitories now consumes 10 Materials and 10 Tools resources as it should.