Sonos Radio mini-media-player

Hey,
i created this nice card with ’ mini-media-player ’ is it possible to remove the two buttons and instead just make one button which toggles between group/ungroup?

cards:
  - cards:
      - entity: media_player.wohnzimmer
        type: media-control
        tap_action:
          action: more-info
      - entity: media_player.wohnzimmer
        hide:
          icon: true
          info: true
          mute: true
          power: true
          source: true
          volume: true
          name: true
          controls: true
          group: true
        mini-media-player-progress-height: 1px
        progress: true
        speaker_group:
          platform: sonos
          show_group_count: true
          expanded: true
          entities:
            - entity_id: media_player.wohnzimmer
              name: Wohnzimmer
            - entity_id: media_player.bad
              name: Bad
              hide:
                volume: false
        shortcuts:
          buttons:
            - type: service
              image: /local/pics/Hr1.png
              id: media_player.select_source
              data:
                entity_id: media_player.wohnzimmer
                source: hr 1
            - type: service
              image: /local/pics/Hr3.png
              id: media_player.select_source
              data:
                entity_id: media_player.wohnzimmer
                source: hr 3
            - type: service
              image: /local/pics/Hr4.png
              id: media_player.select_source
              data:
                entity_id: media_player.wohnzimmer
                source: hr 4
            - type: service
              image: /local/pics/harmony.fm.png
              id: media_player.select_source
              data:
                entity_id: media_player.wohnzimmer
                source: harmony.fm
            - type: service
              image: /local/pics/ndr2.png
              id: media_player.select_source
              data:
                entity_id: media_player.wohnzimmer
                source: NDR 2 Schleswig-Holstein
            - type: service
              image: /local/pics/FFH.png
              id: media_player.select_source
              data:
                entity_id: media_player.wohnzimmer
                source: Hit Radio FFH
          columns: 3
        show_group_count: true
        show_progress: true
        type: custom:mini-media-player
        volume_stateless: true
      - entity: media_player.wohnzimmer
        hide:
          controls: true
          icon: true
          info: true
          max_volume: 100
          min_volume: 0
          play_pause: true
          power: true
          progress: true
          source: true
          volume: false
        type: custom:mini-media-player
    type: vertical-stack
mode: vertical
type: custom:stack-in-card

I don’t have the expanded: true
In it…
So that gives me a picture top right that has
The sonos group in it…(as button)

speaker_group:
  platform: sonos
  show_group_count: true

Yeah i know that, but that just hides it. I just want one single button that groups instead of the two now…

Use a shortcut item with a service action, to call the join service.