QmlDesigner: Fix crash in project storage builds

Display name does not work at all and makes no sense here.
We use the first exported type name.

Task-number: QDS-15029
Change-Id: I825447e18c940996dc7c80ff9ff31aded7d8b666
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/qmldesigner/components/bindingeditor/bindingeditor.cpp

@@ -260,8 +260,12 @@ void BindingEditor::prepareBindings()
             }
 
             if (!binding.properties.isEmpty()) {
-                binding.item = metaInfo.displayName();
+                for (auto &exportedType :
+                     metaInfo.exportedTypeNamesForSourceId(model->fileUrlSourceId())) {
+                    binding.item = exportedType.name.toQString();
                     bindings.append(binding);
+                    break;
+                }
             }
         }
     }