Changes the raise hand event name to fit better the action

conference.js

     setRaisedHand(raisedHand) {
         if (raisedHand !== this.isHandRaised)
         {
-            APP.UI.onRaiseHandChanged(raisedHand);
+            APP.UI.onLocalRaiseHandChanged(raisedHand);
 
             this.isHandRaised = raisedHand;
             // Advertise the updated status

modules/UI/UI.js

  * @param {boolean} isRaisedHand indicates the current state of the
  * "raised hand"
  */
-UI.onRaiseHandChanged = function (isRaisedHand) {
-    eventEmitter.emit(UIEvents.RAISE_HAND_CHANGED, isRaisedHand);
+UI.onLocalRaiseHandChanged = function (isRaisedHand) {
+    eventEmitter.emit(UIEvents.LOCAL_RAISE_HAND_CHANGED, isRaisedHand);
 };
 
 /**

modules/UI/toolbars/Toolbar.js

                                                             isVisible);
             });
 
-        APP.UI.addListener(UIEvents.RAISE_HAND_CHANGED,
+        APP.UI.addListener(UIEvents.LOCAL_RAISE_HAND_CHANGED,
             function(isRaisedHand) {
                 Toolbar._toggleRaiseHand(isRaisedHand);
             });

service/UI/UIEvents.js

     /**
      * Notifies that the raise hand has been changed.
      */
-    RAISE_HAND_CHANGED: "UI.raise_hand_changed",
+    LOCAL_RAISE_HAND_CHANGED: "UI.local_raise_hand_changed",
 
     /**
      * Notifies that the avatar is displayed or not on the largeVideo.