Trapeze hide rods, add window clamps

On Trapeze families, all rods should have a visibility setting to turn them on or off. Only the center rod can be turned on and off right now. This has came about because I have many instances where the steel is different levels, and my trapeze will have one side as a beam clamp, and the other needing a window clamp. With that being said, I would also like to see a window clamp family (or just a place holder box) that is adjusted with the same offset as the rod. The rod needs to shut off and drop the location point down to the top of the strut. We use the schedule with prefab, and when the rod is turned off, it needs to show 0" or 1/16" long so they know to not put anything in that spot.