I don't know, if this is intended by Cryptic or if it is a bug. I also don't know, when this happened, but it is cool nonetheless.
By pure chance, while being at a Fleet Colony, I noticed that I could put my Powerboard and my Floater in my ground powers tray. Naturally, I was puzzled by this as I knew they were in my inventory.
So, I tested it. And it worked.
Should be handy for the Lohlunat Festival.