Fixed back button in columns view (again) (#8014)

Author: gave92

src/Files/Views/LayoutModes/ColumnViewBrowser.xaml.cs

@@ -102,10 +102,10 @@ protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
         public override void Dispose()
         {
             base.Dispose();
-            ColumnHost.ActiveBlades.Select(x => ((x.Content as Frame)?.Content as ColumnShellPage).SlimContentPage as ColumnViewBase).Where(x => x != null).ForEach(x => x.ItemInvoked -= ColumnViewBase_ItemInvoked);
-            ColumnHost.ActiveBlades.ForEach(x => ((x.Content as Frame)?.Content as ColumnShellPage).ContentChanged -= ColumnViewBrowser_ContentChanged);
-            ColumnHost.ActiveBlades.ForEach(x => ((x.Content as Frame)?.Content as UIElement).GotFocus -= ColumnViewBrowser_GotFocus);
-            ColumnHost.ActiveBlades.Select(x => (x.Content as Frame)?.Content).OfType<IDisposable>().ForEach(x => x.Dispose());
+            ColumnHost.Items.OfType<BladeItem>().Select(x => ((x.Content as Frame)?.Content as ColumnShellPage).SlimContentPage as ColumnViewBase).Where(x => x != null).ForEach(x => x.ItemInvoked -= ColumnViewBase_ItemInvoked);
+            ColumnHost.Items.OfType<BladeItem>().ForEach(x => ((x.Content as Frame)?.Content as ColumnShellPage).ContentChanged -= ColumnViewBrowser_ContentChanged);
+            ColumnHost.Items.OfType<BladeItem>().ForEach(x => ((x.Content as Frame)?.Content as UIElement).GotFocus -= ColumnViewBrowser_GotFocus);
+            ColumnHost.Items.OfType<BladeItem>().Select(x => (x.Content as Frame)?.Content).OfType<IDisposable>().ForEach(x => x.Dispose());
             UnhookEvents();
             CommandsViewModel?.Dispose();
         }