Polydock segfaults every now and then due to a weak ref issue with Wnck

[folke]

Related commit: https://gitlab.gnome.org/GNOME/libwnck/-/merge_requests/11

No idea how and if I can fix this, so if anyone has any ideas, very much appreciated :)

[folke]

           UID: 1000 (folke)
           GID: 1000 (folke)
        Signal: 11 (SEGV)
     Timestamp: Wed 2020-06-03 01:05:53 CEST (15min ago)
  Command Line: /usr/bin/gjs /home/folke/.pnpm-global/bin/../../projects/polydock/dist/polydock.js
    Executable: /usr/bin/gjs-console
 Control Group: /user.slice/user-1000.slice/session-1.scope
          Unit: session-1.scope
         Slice: user-1000.slice
       Session: 1
     Owner UID: 1000 (folke)
       Boot ID: a53a9f7f95a34701ae97e935ea91ea99
    Machine ID: a2e760262118492a8b8d1c48dc69c4c4
      Hostname: flaptop
       Storage: /var/lib/systemd/coredump/core.gjs.1000.a53a9f7f95a34701ae97e935ea91ea99.157295.1591139153000000000000.lz4
       Message: Process 157295 (gjs) of user 1000 dumped core.
                
                Stack trace of thread 157295:
                #0  0x00007fc57aec9bd9 g_type_check_instance_cast (libgobject-2.0.so.0 + 0x34bd9)
                #1  0x00007fc56440f521 window_weak_notify_cb (libwnck-3.so.0 + 0x13521)
                #2  0x00007fc57aeacac7 weak_refs_notify (libgobject-2.0.so.0 + 0x17ac7)
                #3  0x00007fc57af20ade g_data_set_internal (libglib-2.0.so.0 + 0x32ade)
                #4  0x00007fc57aeadc78 g_object_unref (libgobject-2.0.so.0 + 0x18c78)
                #5  0x00007fc57b062013 _ZN14ObjectInstance21release_native_objectEv (libgjs.so.0 + 0x49013)
                #6  0x00007fc57b062141 _ZN14ObjectInstance23disassociate_js_gobjectEv (libgjs.so.0 + 0x49141)
                #7  0x00007fc57b05c9c8 _ZNKSt8functionIFvP14ObjectInstanceEEclES1_ (libgjs.so.0 + 0x439c8)```