[AdvPaste]Clear image sources to fix memory leak (#33438)

* [AdvancedPaste] Clear image sources to fix memory leak

src/modules/AdvancedPaste/AdvancedPaste/AdvancedPasteXAML/Pages/MainPage.xaml.cs

@@ -5,6 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using AdvancedPaste.Helpers;
@@ -86,6 +87,11 @@ namespace AdvancedPaste.Pages
 
                 _dispatcherQueue.TryEnqueue(async () =>
                 {
+                    // Clear to avoid leaks due to Garbage Collection not clearing the bitmap from memory. Fix for https://github.com/microsoft/PowerToys/issues/33423
+                    clipboardHistory.Where(x => x.Image is not null)
+                                    .ToList()
+                                    .ForEach(x => x.Image.ClearValue(BitmapImage.UriSourceProperty));
+
                     clipboardHistory.Clear();
 
                     foreach (var item in items)