docker stack ls does not list stacks with no services

Description

It seems that docker stack ls only lists stacks that have at least one service defined. When deploying a stack with no services (i.e. containing secrets only), the stack is deployed correctly, but it is not listed and one needs to know/guess its name.

Steps to reproduce the issue:

1. Create a stack deployment file with no services in it, e.g.:

> cat docker-stack-secrets.yml
version: '3.5'

secrets:
  sonar-secret:
    name: sonar-secret
    file: secrets/${ENV:-sandbox}/sonar-secret.txt

2. Deploy the stack:

> docker stack deploy -c docker-stack-secrets.yml sq-secret
Creating secret sonar-secret

3. Note that the stack is correctly deployed (the secret is created), but the stack list only shows different stacks:

> docker secret ls
ID                          NAME           DRIVER    CREATED         UPDATED
zgd8foyzsvpjmp3t88tkvbh4h   sonar-secret             7 seconds ago   7 seconds ago

Describe the results you received:

> docker stack ls
NAME      SERVICES   ORCHESTRATOR
proxy     1          Swarm

Describe the results you expected:

> docker stack ls
NAME      SERVICES   ORCHESTRATOR
proxy     1          Swarm
sq-secret 0          Swarm

Additional information you deem important (e.g. issue happens only occasionally):

Output of docker version:

Client: Docker Engine - Community
 Cloud integration: 1.0.4
 Version:           20.10.0
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        7287ab3
 Built:             Tue Dec  8 18:55:31 2020
 OS/Arch:           windows/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.0
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       eeddea2
  Built:            Tue Dec  8 18:58:04 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Output of docker info:

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.4.2-docker)
  scan: Docker Scan (Docker Inc., v0.5.0)

Server:
 Containers: 1
  Running: 1
  Paused: 0
  Stopped: 0
 Images: 155
 Server Version: 20.10.0
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: active
  NodeID: n8392udrf5snj5t9r31p2smy3
  Is Manager: true
  ClusterID: ajzn6c5rimljdj3i1byweuuzb
  Managers: 1
  Nodes: 1
  Default Address Pool: 10.0.0.0/8
  SubnetSize: 24
  Data Path Port: 4789
  Orchestration:
   Task History Retention Limit: 5
  Raft:
   Snapshot Interval: 10000
   Number of Old Snapshots to Retain: 0
   Heartbeat Tick: 1
   Election Tick: 10
  Dispatcher:
   Heartbeat Period: 5 seconds
  CA Configuration:
   Expiry Duration: 3 months
   Force Rotate: 0
  Autolock Managers: false
  Root Rotation In Progress: false
  Node Address: 192.168.65.3
  Manager Addresses:
   192.168.65.3:2377
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc version: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 4.19.128-microsoft-standard
 Operating System: Docker Desktop
 OSType: linux
 Architecture: x86_64
 CPUs: 12
 Total Memory: 24.91GiB
 Name: docker-desktop
 ID: IGDZ:5Q55:JAGO:MTVT:LZHI:RYKG:JHAN:PLCX:OTVE:OTWZ:PM63:TCAU
 Docker Root Dir: /var/lib/docker
 Debug Mode: true
  File Descriptors: 67
  Goroutines: 174
  System Time: 2020-12-11T10:36:04.7341641Z
  EventsListeners: 4
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false
 Product License: Community Engine

WARNING: No blkio weight support
WARNING: No blkio weight_device support
WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled

Additional environment details (AWS, VirtualBox, physical, etc.):

Start by reproducing the issue with the docker stack deploy and docker stack ls commands using the secrets-only docker-stack-secrets.yml example. Investigate the stack-listing path and verify completion when a deployed stack with zero services appears in docker stack ls alongside its service count and orchestrator.