Not quite sure on the mechanics of putting the tile at the end of the deck by right clicking. For me, right click means cancel in this game. So, I often try to right click on the tile on that hotbar when I decided not to place a selected tile.
Don't worry, maybe it'll be okay when it's fleshed out, because I would only click until the selected tile is deselected. Let's see. I don't think dragging would be a clean solution to this.
