verify form add

lib/presentation/screens/actions/nursery/sc_edit_action_nursery.dart

                           shape: RoundedRectangleBorder(
                               borderRadius: new BorderRadius.circular(8.0)),
                           onPressed: () {
+                            if (_workerNameController.text.isEmpty ||
+                                _trayNumberController.text.isEmpty) {
+                              return;
+                            }
                             NurseryDetail _nurseryDetail = NurseryDetail()
                               ..workerName = _workerNameController.text
                               ..trayNumber = _trayNumberController.text;