Unfurl notifications

Since we no longer have support for list-style notifications, stop
coalescing notifications into batches and just show contents of the last
message received. Also open the window when clicking on a notification
if it has previously been closed.

// FREEBIE

js/background.js

@@ -98,6 +98,7 @@
         });
 
         Whisper.Notifications.on('click', function(conversation) {
+            showWindow();
             if (conversation) {
                 appView.openConversation(conversation);
             } else {

js/notifications.js

@@ -16,7 +16,7 @@
 
     Whisper.Notifications = new (Backbone.Collection.extend({
         initialize: function() {
-            this.on('add', _.debounce(this.update.bind(this), 1000));
+            this.on('add', this.update);
             this.on('remove', this.onRemove);
         },
         onclick: function() {
@@ -59,61 +59,28 @@
                 return;
             }
 
-            if (this.length > 1) {
-                var conversationIds = _.uniq(this.map(function(m) {
-                    return m.get('conversationId');
-                }));
-                if (conversationIds.length === 1 && this.showSender()) {
-                    iconUrl = this.at(0).get('iconUrl');
+            var m = this.last();
+            var type = 'basic';
+            var message = i18n('newMessage');
+            var imageUrl;
+            if (this.showMessage()) {
+                message = m.get('message');
+                if (m.get('imageUrl')) {
+                    type = 'image';
+                    imageUrl = m.get('imageUrl');
                 }
-                extension.notification.update({
-                    type    : 'list',
-                    iconUrl : iconUrl,
-                    title   : title,
-                    message : 'Most recent from ' + this.last().get('title'),
-                    items   : this.map(function(m) {
-                        var message, title;
-                        if (this.showMessage()) {
-                            return {
-                                title   : m.get('title'),
-                                message : m.get('message')
-                            };
-                        } else if (this.showSender()) {
-                            return {
-                                title   : m.get('title'),
-                                message : i18n('newMessage')
-                            };
-                        }
-                    }.bind(this)),
-                    buttons : [{
-                        title   : 'Mark all as read',
-                        iconUrl : 'images/check.svg'
-                    }]
-                });
-            } else {
-                var m = this.at(0);
-                var type = 'basic';
-                var message = i18n('newMessage');
-                var imageUrl;
-                if (this.showMessage()) {
-                    message = m.get('message');
-                    if (m.get('imageUrl')) {
-                        type = 'image';
-                        imageUrl = m.get('imageUrl');
-                    }
-                }
-                if (this.showSender()) {
-                    title = m.get('title');
-                    iconUrl = m.get('iconUrl');
-                }
-                extension.notification.update({
-                    type     : type,
-                    title    : title,
-                    message  : message,
-                    iconUrl  : iconUrl,
-                    imageUrl : imageUrl
-                });
             }
+            if (this.showSender()) {
+                title = m.get('title');
+                iconUrl = m.get('iconUrl');
+            }
+            extension.notification.update({
+                type     : type,
+                title    : title,
+                message  : message,
+                iconUrl  : iconUrl,
+                imageUrl : imageUrl
+            });
         },
         getSetting: function() {
             return storage.get('notification-setting') || 'message';