Fire status message update when there is no status message.
Fire status message update when there is no status message.

In case there was a status message and later that message is removed from the presence, fire an event so the UI can also clear it.

nevermind-corp/ljm,jitsi/lib-jitsi-meet,jitsi/lib-jitsi-meet,damencho/lib-jitsi-meet,adambowles/lib-jitsi-meet,jiyeyuran/lib-jitsi-meet,adambowles/lib-jitsi-meet