Make QuickGrid's private CloseColumnOptions into public CloseColumnOptionsAsync

Author: matthetherington

src/Components/QuickGrid/Microsoft.AspNetCore.Components.QuickGrid/src/QuickGrid.razor

@@ -10,7 +10,7 @@
         @{ FinishCollectingColumns(); }
         <ColumnsCollectedNotifier TGridItem="TGridItem" />
 
-        <table theme="@Theme" aria-rowcount="@(_ariaBodyRowCount + 1)" @ref="_tableReference" @onclosecolumnoptions="CloseColumnOptions" @attributes="AdditionalAttributes" class="@GridClass()">
+        <table theme="@Theme" aria-rowcount="@(_ariaBodyRowCount + 1)" @ref="_tableReference" @onclosecolumnoptions="CloseColumnOptionsAsync" @attributes="AdditionalAttributes" class="@GridClass()">
             <thead>
                 <tr>
                     @_renderColumnHeaders

src/Components/QuickGrid/Microsoft.AspNetCore.Components.QuickGrid/src/QuickGrid.razor.cs

@@ -272,6 +272,16 @@ public Task ShowColumnOptionsAsync(ColumnBase<TGridItem> column)
         return Task.CompletedTask;
     }
 
+    /// <summary>
+    /// Closes the <see cref="ColumnBase{TGridItem}.ColumnOptions"/> UI that was previously displayed.
+    /// </summary>
+    public Task CloseColumnOptionsAsync()
+    {
+        _displayOptionsForColumn = null;
+        StateHasChanged();
+        return Task.CompletedTask;
+    }
+
     /// <summary>
     /// Instructs the grid to re-fetch and render the current data from the supplied data source
     /// (either <see cref="Items"/> or <see cref="ItemsProvider"/>).
@@ -440,9 +450,4 @@ public async ValueTask DisposeAsync()
             // the client disconnected. This is not an error.
         }
     }
-
-    private void CloseColumnOptions()
-    {
-        _displayOptionsForColumn = null;
-    }
 }