Wizard fixes as discussed here: https://swift-project.slack.com/archives/G7GD2UP9C/p1534597257000200

- improved message for initial data loading
- Simulator wizard page before 1st model set page
- 1st model set component, forced directory loading (and not just displaying model cache)

src/blackgui/components/dbownmodelsdialog.cpp

@@ -39,6 +39,11 @@ namespace BlackGui
             return ui->comp_OwnModels->requestModelsInBackground(simulator, onlyIfNotEmpty);
         }
 
+        int CDbOwnModelsDialog::getOwnModelsCount() const
+        {
+            return ui->comp_OwnModels->getOwnModelsCount();
+        }
+
         const CDbOwnModelsComponent *CDbOwnModelsDialog::modelsComponent() const
         {
             return ui->comp_OwnModels;