Avalonia - Save Manager (#3476)

* Add save manager to account selector

* add fallback to app metadata for titlename if app is not in gamelist

* Allow recovering lost accounts

Ryujinx.Ava/Common/ApplicationHelper.cs

@@ -113,6 +113,11 @@ namespace Ryujinx.Ava.Common
                 return;
             }
 
+            OpenSaveDir(saveDataId);
+        }
+
+        public static void OpenSaveDir(ulong saveDataId)
+        {
             string saveRootPath = Path.Combine(_virtualFileSystem.GetNandPath(), $"user/save/{saveDataId:x16}");
 
             if (!Directory.Exists(saveRootPath))