Keep mesh vertex/face identificators consistent through edits[REQUEST]

[JanFilipec]

Motivation / Existing Problem The generated mesh gets deleted and recreated on each edit, meaning the geometry can't be reliably linked.

Description The generated mesh should keep consistent identificators.

Please add possible uses for this feature

[JanFilipec]

Measureit add on is linked to individual vertices and faces so it's necessary to keep them consistent to use this add on reliably