Optimization, UI improvements, Run command

src/Core/FileTime.Core/Timeline/TimeContainer.cs

@@ -29,6 +29,8 @@ namespace FileTime.Core.Timeline
 
         public bool SupportsDirectoryLevelSoftDelete => false;
 
+        public bool IsDisposed { get; private set; }
+
         public TimeContainer(string name, IContainer parent, IContentProvider contentProvider, IContentProvider virtualContentProvider, PointInTime pointInTime)
         {
             _parent = parent;
@@ -121,5 +123,7 @@ namespace FileTime.Core.Timeline
             return new TimeElement(elementDiff.Name, this, Provider, elementDiff.AbsolutePath.VirtualContentProvider ?? elementDiff.AbsolutePath.ContentProvider);
         }
         public Task<bool> CanOpen() => Task.FromResult(true);
+
+        public void Dispose() => IsDisposed = true;
     }
 }

src/Core/FileTime.Core/Timeline/TimeElement.cs

@@ -31,6 +31,8 @@ namespace FileTime.Core.Timeline
         public IContentProvider Provider { get; }
         public IContentProvider VirtualProvider { get; }
 
+        public bool IsDisposed { get; private set; }
+
         public Task Delete(bool hardDelete = false) => Task.CompletedTask;
 
         public IContainer? GetParent() => _parent;
@@ -38,5 +40,10 @@ namespace FileTime.Core.Timeline
         public string GetPrimaryAttributeText() => "";
 
         public Task Rename(string newName) => Task.CompletedTask;
+
+        public Task<string> GetContent(CancellationToken token = default) => Task.FromResult("");
+        public Task<long> GetElementSize(CancellationToken token = default) => Task.FromResult(-1L);
+
+        public void Dispose() => IsDisposed = true;
     }
 }

src/Core/FileTime.Core/Timeline/TimeProvider.cs

@@ -28,6 +28,8 @@ namespace FileTime.Core.Timeline
 
         public bool SupportsDirectoryLevelSoftDelete => false;
 
+        public bool IsDisposed => false;
+
         public TimeProvider(PointInTime pointInTime)
         {
             _pointInTime = pointInTime;
@@ -90,5 +92,7 @@ namespace FileTime.Core.Timeline
 
         public void SetParent(IContainer container) { }
         public Task<bool> CanOpen() => Task.FromResult(true);
+
+        public void Dispose() { }
     }
 }