Renames all active speaker references to be called dominant speaker.

JitsiConference.js

         this.statistics = new Statistics();
     setupListeners(this);
     this.participants = {};
-    this.lastActiveSpeaker = null;
+    this.lastDominantSpeaker = null;
     this.dtmfManager = null;
     this.somebodySupportsDTMF = false;
     this.authEnabled = false;
     });
 
     conference.rtc.addListener(RTCEvents.DOMINANTSPEAKER_CHANGED, function (id) {
-        if(conference.lastActiveSpeaker !== id && conference.room) {
-            conference.lastActiveSpeaker = id;
-            conference.eventEmitter.emit(JitsiConferenceEvents.ACTIVE_SPEAKER_CHANGED, id);
+        if(conference.lastDominantSpeaker !== id && conference.room) {
+            conference.lastDominantSpeaker = id;
+            conference.eventEmitter.emit(JitsiConferenceEvents.DOMINANT_SPEAKER_CHANGED, id);
         }
     });
 

JitsiConferenceEvents.js

      */
     TRACK_REMOVED: "conference.trackRemoved",
     /**
-     * The active speaker was changed.
+     * The dominant speaker was changed.
      */
-    ACTIVE_SPEAKER_CHANGED: "conference.activeSpeaker",
+    DOMINANT_SPEAKER_CHANGED: "conference.dominantSpeaker",
     /**
      * A new user joinned the conference.
      */

doc/API.md

         - TRACK_ADDED - stream received. (parameters - JitsiTrack)
         - TRACK_REMOVED - stream removed. (parameters - JitsiTrack)
         - TRACK_MUTE_CHANGED - JitsiTrack was muted or unmuted. (parameters - JitsiTrack)
-        - ACTIVE_SPEAKER_CHANGED - the active speaker is changed. (parameters - id(string))
+        - DOMINANT_SPEAKER_CHANGED - the dominant speaker is changed. (parameters - id(string))
         - USER_JOINED - new user joined a conference. (parameters - id(string), user(JitsiParticipant))
         - USER_LEFT - a participant left conference. (parameters - id(string), user(JitsiParticipant))
         - MESSAGE_RECEIVED - new text message received. (parameters - id(string), text(string), ts(number))

lib-jitsi-meet.js

         this.statistics = new Statistics();
     setupListeners(this);
     this.participants = {};
-    this.lastActiveSpeaker = null;
+    this.lastDominantSpeaker = null;
     this.dtmfManager = null;
     this.somebodySupportsDTMF = false;
     this.authEnabled = false;
     });
 
     conference.rtc.addListener(RTCEvents.DOMINANTSPEAKER_CHANGED, function (id) {
-        if(conference.lastActiveSpeaker !== id && conference.room) {
-            conference.lastActiveSpeaker = id;
-            conference.eventEmitter.emit(JitsiConferenceEvents.ACTIVE_SPEAKER_CHANGED, id);
+        if(conference.lastDominantSpeaker !== id && conference.room) {
+            conference.lastDominantSpeaker = id;
+            conference.eventEmitter.emit(JitsiConferenceEvents.DOMINANT_SPEAKER_CHANGED, id);
         }
     });
 
      */
     TRACK_REMOVED: "conference.trackRemoved",
     /**
-     * The active speaker was changed.
+     * The dominant speaker was changed.
      */
-    ACTIVE_SPEAKER_CHANGED: "conference.activeSpeaker",
+    DOMINANT_SPEAKER_CHANGED: "conference.dominantSpeaker",
     /**
      * A new user joinned the conference.
      */