wish : freeze/unfreeze brep edges when meshing

 From:  jbshorty
790.1 
Hi Michael.

A wish for exporting n-gon mesh - Would it be possible to add a "freeze/unfreeze" option for the brep edges? For example, i would like to crank up the density slider to get an accurate shape around the edges of each surface, then freeze the border edges, then drop the slider down and only reduce the poly counts of the unfrozen parts.

Thanks,
jonah