Merge pull request #2895 from windows-toolkit/mhawker/sample-fixes

Minor Sample App/Doc Changes

Author: michael-hawker

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/TextToolbar/TextToolbar.bind

@@ -5,6 +5,7 @@
       xmlns:converters="using:Microsoft.Toolkit.Uwp.UI.Converters"
       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+      xmlns:contract7Present="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractPresent(Windows.Foundation.UniversalApiContract,7)"
       mc:Ignorable="d">
 
   <Page.Resources>
@@ -40,7 +41,8 @@
                      Padding="10,3"
                      BorderThickness="1"
                      BorderBrush="{ThemeResource SystemControlForegroundChromeHighBrush}"
-                     Foreground="{ThemeResource SystemControlForegroundBaseMediumBrush}" />
+                     Foreground="{ThemeResource SystemControlForegroundBaseMediumBrush}"
+                     contract7Present:SelectionFlyout="{x:Null}"/>
         <Grid x:Name="MD"
               Grid.Row="1"
               Margin="0, 16"

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/TextToolbar/TextToolbarPage.xaml.cs

@@ -157,7 +157,7 @@ private void Previewer_LinkClicked(object sender, LinkClickedEventArgs e)
             try
             {
                 var link = new Uri(e.Link);
-                var linkOpen = Task.Run(() => Launcher.LaunchUriAsync(link));
+                _ = Launcher.LaunchUriAsync(link);
             }
             catch
             {

Microsoft.Toolkit.Uwp/Helpers/SystemInformation.cs

@@ -224,6 +224,7 @@ void App_VisibilityChanged(Windows.UI.Core.CoreWindow sender, Windows.UI.Core.Vi
         /// Launches the store app so the user can leave a review.
         /// </summary>
         /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
+        /// <remarks>This method needs to be called from your UI thread.</remarks>
         public static async Task LaunchStoreForReviewAsync()
         {
             await Launcher.LaunchUriAsync(new Uri(string.Format("ms-windows-store://review/?PFN={0}", Package.Current.Id.FamilyName)));