Bugfix. onConnected overrides need to return promise.

src/converse-minimize.js

@@ -44,7 +44,7 @@
                 converse.minimized_chats = new converse.MinimizedChats({
                     model: converse.chatboxes
                 });
-                this._super.onConnected.apply(this, arguments);
+                return this._super.onConnected.apply(this, arguments);
             },
 
             registerGlobalEventHandlers: function () {

src/converse-ping.js

@@ -32,12 +32,16 @@
             // New functions which don't exist yet can also be added.
 
             onConnected: function () {
-                this._super.onConnected().done(converse.registerPingHandler);
+                var promise = this._super.onConnected();
+                promise.done(converse.registerPingHandler);
+                return promise;
             },
             onReconnected: function () {
                 // We need to re-register the ping event handler on the newly
                 // created connection.
-                this._super.onReconnected().done(converse.registerPingHandler);
+                var promise = this._super.onReconnected();
+                promise.done(converse.registerPingHandler);
+                return promise;
             }
         },