Get chat box views by id

Fixes bug when fetching controlbox, which doesn't have a jid

src/converse-core.js

@@ -187,7 +187,7 @@
              * returned via the API.
              */
             if (!chatbox) { return; }
-            var view = converse.chatboxviews.get(chatbox.get('jid'));
+            var view = converse.chatboxviews.get(chatbox.get('id'));
             return {
                 'close': view.close.bind(view),
                 'focus': view.focus.bind(view),

src/converse-muc.js

@@ -65,7 +65,7 @@
                 * returned via the API.
                 */
                 if (!chatbox) { return; }
-                var view = converse.chatboxviews.get(chatbox.get('jid'));
+                var view = converse.chatboxviews.get(chatbox.get('id'));
                 var box = this._super.wrappedChatBox.apply(this, arguments);
                 box.is_chatroom = view.is_chatroom;
                 return box;