Make app documentation a dropdown to show postinstall and upstream project link

src/views/app.js

@@ -77,6 +77,11 @@ angular.module('Application').controller('AppController', ['$scope', '$location'
         $scope.view = view;
     };
 
+    $scope.showPostInstall = function () {
+        if (!$scope.app.manifest.postInstallMessage) return;
+        $('#postInstallModal').modal('show');
+    };
+
     $scope.display = {
         busy: false,
         error: {},