0030322: Remove DRAW-command "mesh" as useless

0030322: Remove DRAW-command "mesh" as useless

In fact, the DRAW-command "mesh" is duplicate of "incmesh".

The difference is that the "mesh" creates DRAW-object MeshTest_DrawableMesh. However, this object is currently not applicable (e.g. we cannot display it).

DRAW-commands "mesh", "addshape", "smooth", "edges", "vertices", "medge", "mvertex", "triangle", "dumpvertex", "dumpedge", "dumptriangle" and "onetriangulation" have been removed.

The class MeshTest_DrawableMesh has been removed as useless.

Testgrids "mesh standard_mesh" and "mesh advanced_mesh" have been removed.