I am trying to get a .Panel() element to display just below my .GridPanel() element, all on the same tab. Here is my current code:

                                Html.X().TabPanel()
                                    .TabPosition(TabPosition.Left)
                                    .TabRotation(0)
                                    .Width(1500)
                                    .Height(800)
                                    .MarginSpec("10 10 -10 10")
                                    .Items(
                                        Html.X().GridPanel()
                                            .Title("Request Priorities")
                                            .ID("reqPrioritiesGrid")
                                            .ColumnWidth(1)
                                            .MarginSpec("0 0 0 0")
                                            .Width(1000)
                                            .Height(400)
                                            .Border(true)
                                            .Store(
                                                Html.X().Store()
                                                    .ID("reqPrioritiesStore")
                                                    .AutoLoad(true)
                                                    .DataSource(Model.RequestPriorities)
                                                    .Model(
                                                        Html.X().Model()
                                                            .Fields(f =>
                                                            {
                                                                f.Add(Html.X().ModelField().Name("RequestPriorityName").Type(ModelFieldType.String));
                                                                f.Add(Html.X().ModelField().Name("RequestPriorityDescription").Type(ModelFieldType.String));
                                                                f.Add(Html.X().ModelField().Name("SortOrder").Type(ModelFieldType.Int));
                                                                f.Add(Html.X().ModelField().Name("ResponseTarget").Type(ModelFieldType.String));
                                                                f.Add(Html.X().ModelField().Name("ResponseFormat").Type(ModelFieldType.String));
                                                                f.Add(Html.X().ModelField().Name("ResponseSLA").Type(ModelFieldType.String));
                                                            })
                                                )
                                    .ServerProxy(
                                        Html.X().AjaxProxy()
                                            .Url(Url.Action("ManageLists", "Admin", new { area = "Cadence" }))
                                    )
                                    )
                                .Listeners(l =>
                                {
                                    l.Select.Handler = "handleReqPopulate(record.data);" + "toggleEditRequest();";
                                })
                                    .ColumnModel(
                                        Html.X().Column().Flex(1).Text("Request Priority Name").DataIndex("RequestPriorityName"),
                                        Html.X().Column().Flex(3).Text("Request Priority Desciption").DataIndex("RequestPriorityDescription"),
                                        Html.X().Column().Flex(1).Text("Sort Order").DataIndex("SortOrder"),
                                        Html.X().Column().Flex(1).Text("Response Target").DataIndex("ResponseTarget"),
                                        Html.X().Column().Flex(1).Text("Response Format").DataIndex("ResponseFormat"),
                                        Html.X().Column().Flex(1).Text("Response SLA").DataIndex("ResponseSLA")
                                    ),
                                Html.X().Panel()
                                    .Title("Task Priorities")
                                    .ID("taskPrioritiesGrid"),
                                Html.X().Panel()
                                    .Title("Task Severities"),
                                Html.X().Panel()
                                    .Title("Request Groups"),
                                Html.X().Panel()
                                    .Title("Request Group Types")
                            )
I have tried adding the .Panel() element inside the .Store() scope, but I get an overload error message when I try to do that. Adding it outside of the .Store() creates a new tab. Is there a way to display the panel just below the grid while being on the same tab?