Editor grid zfighting with meshes

The editors snap grid will zfight with flat surfaces of static meshes and BSPs.

Found in 4.19 CL# 4033788, 4.20 preview CL# 4121666, 4.21 CL# 4131780

1. Open the editor
2. Create a blank project
3. Set the static mesh in default level to world origin

Result:
The editor grid will zfight with surface of the mesh

Expected:
The grid would show up as normal