Oops, was looking for edges on the display mesh that I generated

from the NURBS surface! That got very slow very fast.

[git-p4: depot-paths = "//depot/solvespace/": change = 1970]

groupmesh.cpp

@@ -362,7 +362,7 @@ void Group::GenerateDisplayItems(void) {
 
         if(SS.GW.showEdges) {
             runningShell.MakeEdgesInto(&displayEdges);
-            displayMesh.MakeEmphasizedEdgesInto(&displayEdges);
+            runningMesh.MakeEmphasizedEdgesInto(&displayEdges);
         }
 
         displayDirty = false;