Get rid of Layout global

Instead, trigger and listen for events on the conversation collection
object.

js/index.js

@@ -22,7 +22,7 @@
     if (textsecure.storage.getUnencrypted("number_id") === undefined) {
         window.location = '/options.html';
     } else {
-        Whisper.Layout = new Whisper.InboxView({el: document});
+        new Whisper.InboxView({el: document});
         textsecure.storage.putUnencrypted("unreadCount", 0);
         extension.navigator.setBadgeText("");
     }

js/views/conversation_list_item_view.js

@@ -20,14 +20,14 @@ var Whisper = Whisper || {};
     },
 
     open: function(e) {
-      $('.conversation').trigger('close'); // detach any existing conversation views
+      this.$el.addClass('selected');
+
       if (!this.view) {
         this.view = new Whisper.ConversationView({ model: this.model });
       } else {
         this.view.delegateEvents();
       }
-      this.view.render();
-      this.$el.addClass('selected');
+      this.model.collection.trigger('selected', this.view);
     },
 
     render: function() {

js/views/conversation_view.js

@@ -57,7 +57,6 @@
         },
 
         render: function() {
-            Whisper.Layout.setContent(this.$el.show());
             this.view.scrollToBottom();
             return this;
         }

js/views/inbox_view.js

@@ -44,6 +44,11 @@
                 }.bind(this));
             }.bind(this));
 
+            this.conversations.on('selected', function(view) {
+                $('.conversation').hide().trigger('close'); // detach any existing conversation views
+                this.setContent(view.$el.show());
+                view.render();
+            }, this);
         },
         events: {
             'click #new-message': 'new_message',