Code Quality: Improved loading of pinned folders and recent files (#15259)

Author: hishitetsu

src/Files.App/Services/QuickAccessService.cs

@@ -8,7 +8,9 @@ namespace Files.App.Services
 {
 	internal sealed class QuickAccessService : IQuickAccessService
 	{
-		private readonly static string guid = "::{679f85cb-0220-4080-b29b-5540cc05aab6}";
+		// Quick access shell folder (::{679f85cb-0220-4080-b29b-5540cc05aab6}) contains recent files
+		// which are unnecessary for getting pinned folders, so we use frequent places shell folder instead.
+		private readonly static string guid = "::{3936e9e4-d92c-4eee-a85a-bc16d5ea0819}";
 
 		public async Task<IEnumerable<ShellFileItem>> GetPinnedFoldersAsync()
 		{

src/Files.App/Utils/RecentItem/RecentItems.cs

@@ -109,7 +109,8 @@ public async Task UpdateRecentFoldersAsync()
 		/// </summary>
 		public async Task<List<RecentItem>> ListRecentFilesAsync()
 		{
-			return (await Win32Helper.GetShellFolderAsync(QuickAccessGuid, false, true, 0, int.MaxValue)).Enumerate
+			// Since the maximum number of recent files is 20, we set the count to 20 to avoid loading of unnecessary shell items.
+			return (await Win32Helper.GetShellFolderAsync(QuickAccessGuid, false, true, 0, 20)).Enumerate
 				.Where(link => !link.IsFolder)
 				.Select(link => new RecentItem(link, ShowFileExtensions)).ToList();
 		}

src/Files.App/Utils/RecentItem/RecentItemsManager.cs

@@ -11,7 +11,6 @@ public sealed class RecentItemsManager
 		private static readonly string recentItemsPath = Environment.GetFolderPath(Environment.SpecialFolder.Recent);
 		private static readonly string automaticDestinationsPath = Path.Combine(recentItemsPath, "AutomaticDestinations");
 		private const string QuickAccessJumpListFileName = "5f7b5f1e01b83767.automaticDestinations-ms";
-		private const string QuickAccessGuid = "::{679f85cb-0220-4080-b29b-5540cc05aab6}";
 		private DateTime quickAccessLastReadTime = DateTime.MinValue;
 		private FileSystemWatcher? quickAccessJumpListWatcher;