TT#73000 Fix remote participant selection

Change-Id: I69bf17f5b98b7f0a414a9806d92a2ed6279073f6

src/store/conference.js

@@ -221,7 +221,7 @@ export default {
             if(state.selectedParticipant == 'local' && !state.joinState === RequestState.succeeded){
                 state.selectedParticipant = null;
             }
-            else if(state.selectedParticipant == participant){
+            else if(state.selectedParticipant == participant && !state.participants.includes(participant)){
                 state.selectedParticipant = 'local';
                 state.manualSelection = false;
             }

src/store/index.js

@@ -128,7 +128,7 @@ export const store = new Vuex.Store({
             }).onConferenceParticipantLeft((participant)=>{
                 store.commit('conference/participantLeft', participant);
                 store.commit('conference/removeRemoteMedia', participant.id);
-                store.commit('conference/setSelectedParticipant', 'local');
+                store.commit('conference/setSelectedParticipant', participant.id);
             }).onConferenceEvent((event)=>{
                 store.commit('conference/event', event);
             }).onConferenceMessage((message)=>{

t/store/conference.js

@@ -72,9 +72,10 @@ describe('Conference', function(){
 
     });
 
-    it('should store the local participant as selected', () => {
+    it('should store the local participant as selected if current selected participant leaves', () => {
         let state = {
-            selectedParticipant: '123456789'
+            selectedParticipant: '123456789',
+            participants: []
         };
         const participantId = '123456789';
 
@@ -93,4 +94,5 @@ describe('Conference', function(){
         assert.equal(state.selectedParticipant, null);
 
     });
+
 });