Mention the actor (if available) when removed from room

spec/chatroom.js

@@ -611,7 +611,11 @@
                 expect(view.$('.chat-area').is(':visible')).toBeFalsy();
                 expect(view.$('.occupants').is(':visible')).toBeFalsy();
                 var $chat_body = view.$('.chatroom-body');
-                expect($chat_body.html().trim().indexOf('<p>You have been kicked from this room</p><p>The reason given is: "Avaunt, you cullion!"</p>')).not.toBe(-1);
+                expect($chat_body.html().trim().indexOf(
+                    '<p>You have been kicked from this room</p>'+
+                    '<p>This action was done by <strong>Fluellen</strong>.</p>'+
+                    '<p>The reason given is: <em>"Avaunt, you cullion!"</em>.</p>'
+                )).not.toBe(-1);
             }));
 
             it("can be saved to, and retrieved from, browserStorage", mock.initConverse(function (converse) {

src/converse-muc.js

@@ -1113,8 +1113,11 @@
                     var that = this;
                     if (notification.disconnected) {
                         this.showDisconnectMessage(notification.disconnection_message);
+                        if (notification.actor) {
+                            this.showDisconnectMessage(__(___('This action was done by <strong>%1$s</strong>.'), notification.actor));
+                        }
                         if (notification.reason) {
-                            this.showDisconnectMessage(__('The reason given is: "'+notification.reason+'"'), true);
+                            this.showDisconnectMessage(__(___('The reason given is: <em>"%1$s"</em>.'), notification.reason));
                         }
                         this.model.set('connection_status', Strophe.Status.DISCONNECTED);
                         return;