[mirotalksfu] - change icon for extra buttons

public/views/Room.html

@@ -200,7 +200,7 @@ access to use this app.
         </div>
 
         <div id="bottomButtons" class="fadein">
-            <button id="toggleExtraButton" class="hidden"><i class="fas fa-bars"></i></button>
+            <button id="toggleExtraButton" class="hidden"><i class="fas fa-chevron-down"></i></button>
             <button id="startAudioButton" class="hidden"><i class="fas fa-microphone-slash"></i></button>
             <button id="stopAudioButton" class="hidden"><i class="fas fa-microphone"></i></button>
             <button id="startVideoButton" class="hidden"><i class="fas fa-video-slash"></i></button>