Fix copy overwrites the source files sometimes

src/Core/FileTime.Core.Abstraction/Models/IContainer.cs

@@ -8,5 +8,7 @@ public interface IContainer : IItem
     IObservable<IChangeSet<AbsolutePath, string>> Items { get; }
     ReadOnlyObservableCollection<AbsolutePath> ItemsCollection { get; }
     IObservable<bool> IsLoading { get; }
+    bool? IsLoaded { get; }
+    Task WaitForLoaded(CancellationToken token = default);
     bool AllowRecursiveDeletion { get; }
 }