Made the mass-scale-up UI in the machine view show unplaced units
mass scale-up UI in machine view now displays and is functional for the ghost services.
Added tests for new scale-up functionality
Merge pull request #430 from hatched/show-scaled-up-unplaced

Show scaled-up unplaced units.

Mass-scaled-up unplaced units now show in the unplaced units column and are placable.
Ghost services can now be scaled up using the mass-scale-up UI in the machine view.