GUI buttons should be able to be disabled without being hidden

[ReplicaObscura]

Currently Launchpad doesn't have the concept of a "disabled" GUI button.

Where a GUI button would normally be disabled, Launchpad hides it. This is not a bad solution, but it can leave ugly gaps if there are buttons on either side.

Launchpad should be able to gray out a button and make it unhoverable and unclickable.