This tool projects all vertices to the right of the plane defined by the
line gesture towards the plane. By doing this, this tool can create cuts
and plane surfaces in the mesh without modifying the geometry or using
boolean operations, so it is much faster than bisecting the mesh for
cases where the geometry was going to be remeshed afterwards.
Added as experimental as it does not have icon.
Reviewed By: sergey, Severin
Differential Revision: https://developer.blender.org/D9021
e0bfd3968c