Gridfinity Windowed Bins - Rails

Modified version of Zack's windowed bins, uses same glass slides but no longer needs tape or glue to hold the frame in. Needs supports when printing the tab, print with the tab with the outward facing side on the build plate and supports under the small 90 degree overhangs, after removing supports should be a firm-ish fit. If its too loose can add a drip of superglue. Also modified the magnet holes below so it can be printed without supports.