I'm trying to build some maps using the dynamic lighting and I used to be able to hold SHIFT to snap the corners of polygon walls, windows, and doors together to ensure they lined up. This is still working with the polygon line but not with doors and windows. I have tried editing the map from multiple computers both Mac and PC, and with both Firefox and Chrome with no add-on or plugins. Nothing I do works. This used to work wonderfully but stopped working for me just today. It may just be some setting I messed with but I can't seem to find it.