Masterdata laoding enhancement, brands added

Pages/CaritasServiceFundVeloKeyDataPage.razor

     private string brandStringValue;
     private Brand selectedBrand;
     private Brand SelectedBrand {get { return selectedBrand; }
-                                 set { selectedBrand = (value != null) ? value: new Brand(-999, brandStringValue); }
+        set { selectedBrand = (value != null) ? value: new Brand(-999, brandStringValue); }
     }
     private void setBrandValue(string value) {
         brandStringValue = value;
+        selectedBrand = null;
     }
 
     protected async override void OnInitialized() {