don't draw mesh nodes by default

Common/DefaultOptions.h

@@ -930,7 +930,7 @@ StringXNumber MeshOptions_Number[] = {
   { F|O, "Optimize" , opt_mesh_optimize , 0. , 
     "Optimize the mesh using Netgen to improve the quality of tetrahedral elements" },
 
-  { F|O, "Points" , opt_mesh_points , 1. , 
+  { F|O, "Points" , opt_mesh_points , 0. , 
     "Display mesh vertices (nodes)?" },
   { F|O, "PointsPerElement" , opt_mesh_points_per_element , 0. , 
     "Display mesh nodes per element (slower, but permits to visualize only a subset of the nodes)" },