Everything comes off the grid by default
While developing my new map for the oldc I got hit hard by one of UZB's most notorious issues of everything coming off the grid. By everything, I mean everything. Vertices, Linedefs, sectors, and Map objects!
While most of this list can be fixed with what found by analysis mode, map things can't be.
This is causing problems where stuff like vertex things are placed on ultraprecise coordinates causing them to snap to wrong coordinates in game.
We need auto snapping to be default so stuff doesn't break or needs constant repair while in UDMF.