Adds optional label to analytics handler.

JitsiConnection.js

 
     this.addEventListener(JitsiConnectionEvents.CONNECTION_FAILED,
         function (errType, msg) {
-            Statistics.analytics.sendEvent('connection.failed.' + errType);
+            // sends analytics and callstats event
+            Statistics.sendEventToAll('connection.failed.' + errType, msg);
         }.bind(this));
 
     this.addEventListener(JitsiConnectionEvents.CONNECTION_DISCONNECTED,

modules/statistics/AnalyticsAdapter.js

 // implementation we will use here and we have to postpone it i.e. we will make
 // a lazy decision, will wait for loaded or dispose methods to be called.
 // in the meantime we accumulate any events received
-AnalyticsAdapter.prototype.sendEvent = function (action, data) {
+AnalyticsAdapter.prototype.sendEvent = function (action, data, label) {
     if (this.analytics === null || typeof this.analytics === 'undefined') {
         // missing this.analytics but have window implementation, let's use it
         if (window.Analytics) {
         else {
             AnalyticsAdapter.eventsQueue.push({
                 action: action,
-                data: data
+                data: data,
+                label: label
             });
             // stored, lets break here
             return;
         }
     }
     try {
-        this.analytics.sendEvent(action + this.browserActionSuffix, data);
+        this.analytics.sendEvent(
+            action + this.browserActionSuffix, data, label);
     } catch (ignored) {}
 };
 
     // new analytics lets send all events if any
     if (AnalyticsAdapter.eventsQueue.length) {
         AnalyticsAdapter.eventsQueue.forEach(function (event) {
-            this.sendEvent(event.action, event.data);
+            this.sendEvent(event.action, event.data. event.label);
         }.bind(this));
         AnalyticsAdapter.eventsQueue.length = 0;
     }