+ hide input shape after creating fem object, give feedback on wrong selection for nodes set

src/Mod/Fem/Gui/TaskDlgMeshShapeNetgen.cpp

@@ -68,10 +68,11 @@ TaskDlgMeshShapeNetgen::~TaskDlgMeshShapeNetgen()
 
 void TaskDlgMeshShapeNetgen::open()
 {
-    //select->activate();
-    //Edge2TaskObject->execute();
-    //param->setEdgeAndClusterNbr(Edge2TaskObject->NbrOfEdges,Edge2TaskObject->NbrOfCluster);
-
+    // a transaction is already open at creation time of the mesh
+    if (!Gui::Command::hasPendingCommand()) {
+        QString msg = tr("Edit FEM mesh");
+        Gui::Command::openCommand((const char*)msg.toUtf8());
+    }
 }
 
 void TaskDlgMeshShapeNetgen::clicked(int button)
@@ -99,8 +100,16 @@ bool TaskDlgMeshShapeNetgen::accept()
             Gui::WaitCursor wc;
             FemMeshShapeNetgenObject->recompute();
         }
+
+        // hide the input object
+        App::DocumentObject* obj = FemMeshShapeNetgenObject->Shape.getValue();
+        if (obj) {
+            Gui::Application::Instance->hideViewProvider(obj);
+        }
+
         //FemSetNodesObject->Label.setValue(name->name);
         Gui::Command::doCommand(Gui::Command::Gui,"Gui.activeDocument().resetEdit()");
+        Gui::Command::commitCommand();
 
         return true;
     }