Updated conditions for Deselect and Unhide

Seenginx/Components/FilesWithEditor.razor.cs

@@ -104,7 +104,7 @@ namespace Seenginx.Components
 
 		protected async Task OnFileCloseClick(MouseEventArgs e)
 		{
-			Files.ForEach(f => f.Deselect());
+			Files.ForEach(f => { if (f.IsSelected != null) f.Deselect(); });
 			SelectedFile = null;
 			await JsRuntime.InvokeVoidAsync("ClearEditor");
 			IsDraftMode = false;