Revert mention count with ignoring 'badge-notify'
Revert mention count with ignoring 'badge-notify'

'badge-notify' counts also unread channels.

yuya-oc/electron-mattermost,yuya-oc/electron-mattermost,mattermost/desktop,jnugh/desktop,St-Ex/desktop,St-Ex/desktop,jnugh/desktop,mattermost/desktop,jnugh/desktop,mattermost/desktop,yuya-oc/electron-mattermost,mattermost/desktop,yuya-oc/desktop,mattermost/desktop,yuya-oc/desktop,St-Ex/desktop,yuya-oc/desktop