Draw a preview when placing new/moving existing objects
Put the preliminary work in the previous commit to even more use, now we finally show a preview model when moving existing or placing new objects. Not only makes it the process of moving objects a lot more predictable, in case of objects that need to be attached to walls (read: the sink for the being) a lot less frustrating as well.
Still missing is drawing the model in the same colours as the tiles it will be placed on to indicate if this a valid spot to put it on.