I have added the listener but the button refresh continues showing and it's enabled.
<BottomBar>
<ext:PagingToolBar ID="PagingToolBarReservation" runat="server" PageSize="10" StoreID="storeReservationResult" AfterPageText="" FirstText="<%$ Resources: lblFirst %>" LastText="<%$ Resources: lblLast %>" NextText="<%$ Resources: lblNext %>" PrevText="<%$ Resources: lblPrevious %>" BeforePageText="<%$ Resources: lblPage %>" RefreshText= "<%$ Resources: lblRefresh %>" EmptyMsg="<%$ Resources: lblEmptyMsg %>" DisplayMsg="<%$ Resources: lblDisplayMsg %>">
<Listeners>
<Render Handler="this.loading.disable();" />
</Listeners>
</ext:PagingToolBar>
</BottomBar>