Fix conversations opening from the background

From a notification, for example, we were opening the inbox but not the
conversation.

// FREEBIE

js/index.js

@@ -24,7 +24,14 @@
             window.location = '/options.html';
         } else {
             extension.windows.getCurrent(function(appWindow) {
-                new bg.Whisper.InboxView({appWindow: appWindow}).$el.prependTo(bg.$('body',document));
+                var view = new bg.Whisper.InboxView({appWindow: appWindow});
+                view.$el.prependTo(bg.$('body',document));
+                window.openConversation = function(conversation) {
+                    if (conversation) {
+                        view.openConversation(null, {conversation: conversation});
+                    }
+                };
+                openConversation(bg.getOpenConversation());
             });
         }
     });

js/panel_controller.js

@@ -118,12 +118,6 @@
         }
     };
 
-    function openConversation(conversation) {
-        openInbox();
-        var appWindow = chrome.app.window.get(inboxWindowId);
-        appWindow.contentWindow.trigger('open', {conversation: conversation});
-    }
-
     /* Inbox window controller */
     var inboxOpened = false;
     var inboxWindowId = 'inbox';
@@ -164,6 +158,22 @@
         }
     };
 
+    var open;
+    function openConversation(conversation) {
+        if (inboxOpened === true) {
+            var appWindow = chrome.app.window.get(inboxWindowId);
+            appWindow.contentWindow.openConversation(conversation);
+        } else {
+            open = conversation;
+            openInbox();
+        }
+    }
+    window.getOpenConversation = function() {
+        var o = open;
+        open = null;
+        return o;
+    };
+
     extension.onLaunched(function() {
         storage.onready(function() {
             if (textsecure.registration.isDone()) {