setServiceIcon(url) {
    ipcRenderer.send('avatar', url);

    debug('Sending avatar url to host', url);
  }
Set the thumbnail for the service

@param {int} direct      Set the count of direct messages
                         eg. Slack direct mentions, or a
                         message to @channel
@param {int} indirect    Set a badge that defines there are
                         new messages but they do not involve
                         me directly to me eg. in a channel