Ensure preview button is not shown when the content is being created

src/Umbraco.Web.UI.Client/src/views/content/content.edit.controller.js

@@ -13,6 +13,7 @@ function ContentEditController($scope, $rootScope, $routeParams, $q, $timeout, $
     $scope.subButtons = [];    
     $scope.currentSection = appState.getSectionState("currentSection");
     $scope.currentNode = null; //the editors affiliated node
+    $scope.isNew = $routeParams.create;
 
     //This sets up the action buttons based on what permissions the user has.
     //The allowedActions parameter contains a list of chars, each represents a button by permission so 

src/Umbraco.Web.UI.Client/src/views/content/edit.html

@@ -46,7 +46,7 @@
                             </a>
                         </div>
 
-                        <div class="btn-group" ng-show="content.template">
+                        <div class="btn-group" ng-show="content.template && !isNew">
                             <a class="btn" ng-click="preview(content)">
                                 <localize key="buttons_showPage">Preview page</localize>
                             </a>