Fix watch state.

backend/src/Squidex.Domain.Apps.Entities/Comments/WatchingService.cs

@@ -20,7 +20,7 @@ public sealed class WatchingService : IWatchingService
     {
         private static readonly Duration Timeout = Duration.FromMinutes(1);
 
-        public Dictionary<string, Instant> Users { get; } = new Dictionary<string, Instant>();
+        public Dictionary<string, Instant> Users { get; set; } = new Dictionary<string, Instant>();
 
         public (bool, string[]) Add(string watcherId, IClock clock)
         {

backend/src/Squidex/Areas/Api/Controllers/Comments/CommentsController.cs

@@ -32,7 +32,6 @@ public sealed class CommentsController : ApiController
         : base(commandBus)
     {
         this.commentsLoader = commentsLoader;
-
         this.watchingService = watchingService;
     }