sce: more useful context menu text

source/ArmarXGui/gui-plugins/StatechartEditorPlugin/StateEditorController.cpp

@@ -218,6 +218,18 @@ namespace armarx
         if (!transition->destinationState || !transition->destinationState->getStateClass()
             || !node || !node->getCppExists() || !transition->sourceState)
         {
+            if (!node->getCppExists())
+            {
+                enableTransitionCode->setText(enableTransitionCode->text() + " (no parent cpp)");
+            }
+            else if (!transition->sourceState)
+            {
+                enableTransitionCode->setText("Transition code unavailable for initial transition");
+            }
+            else if (transition->destinationState && !transition->destinationState->getStateClass())
+            {
+                enableTransitionCode->setText(enableTransitionCode->text() + " (final or unloaded destination state)");
+            }
             enableTransitionCode->setEnabled(false);
         }