Fix of several issues related to gizmos updating and undo/redo

Common gizmos data cannot be used in on_set_state method
Also prevented calling render on empty GLVertexArrays

src/slic3r/GUI/MeshUtils.cpp

@@ -49,7 +49,8 @@ void MeshClipper::render_cut()
     if (! m_triangles_valid)
         recalculate_triangles();
 
-    m_vertex_array.render();
+    if (m_vertex_array.has_VBOs())
+        m_vertex_array.render();
 }