Hide those unsightly holes

Quick decoration to denote unused Merger/Splitter Holes (especially useful when making complicated Blueprints)

When designing a complicated blueprint it can be helpful to mark inputs that won't be used. Or for a finished factory - I was playing around with a bunch of different ways to and with new vertical nudge (H for Hologram, then PgUp/PgDn ) it's super easy to stick a Beam Support so that it basically perfectly covers up a hole.