Prevent customized previews from being created if the preview panel is not visible

Author: TBM13

Flow.Launcher/MainWindow.xaml

@@ -452,10 +452,8 @@
                             MinHeight="380"
                             MaxHeight="{Binding ElementName=ResultListBox, Path=ActualHeight}"
                             Padding="0 0 10 10"
-                            d:DataContext="{d:DesignInstance vm:ResultViewModel}"
-                            DataContext="{Binding PreviewSelectedItem, Mode=OneWay}"
                             Visibility="{Binding ShowCustomizedPreview}">
-                            <ContentControl Content="{Binding Result.PreviewPanel.Value}" />
+                            <ContentControl Content="{Binding CustomizedPreviewControl}" />
                         </Border>
                     </Grid>
                 </Grid>

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -8,6 +8,7 @@
 using System.Threading.Channels;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Threading;
@@ -807,6 +808,12 @@ public bool InternalPreviewVisible
             }
         }
 
+        public Visibility ShowCustomizedPreview
+            => InternalPreviewVisible && PreviewSelectedItem?.Result.PreviewPanel != null ? Visibility.Visible : Visibility.Collapsed;
+
+        public UserControl CustomizedPreviewControl
+            => ShowCustomizedPreview == Visibility.Visible ? PreviewSelectedItem?.Result.PreviewPanel.Value : null;
+
         public int ResultAreaColumn { get; set; } = ResultAreaColumnPreviewShown;
 
         // This is not a reliable indicator of whether external preview is visible due to the

Flow.Launcher/ViewModel/ResultViewModel.cs

@@ -66,8 +66,6 @@ public ResultViewModel(Result result, Settings settings)
 
         public Visibility ShowDefaultPreview => Result.PreviewPanel == null ? Visibility.Visible : Visibility.Collapsed;
 
-        public Visibility ShowCustomizedPreview => Result.PreviewPanel == null ? Visibility.Collapsed : Visibility.Visible;
-
         public Visibility ShowIcon
         {
             get