Fixes static pages when permalinks are active.

fixes #2938
- Fix `page === 1` occurences
- Fix ember logic

core/client/controllers/post-settings-menu.js

@@ -5,16 +5,16 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
         var self = this;
 
         if (arguments.length > 1) {
-            this.set('page', val ? 1 : 0);
+            this.set('page', val);
 
             return this.get('model').save().then(function () {
                 self.notifications.showSuccess('Successfully converted to ' + (val ? 'static page' : 'post'));
 
-                return !!self.get('page');
+                return self.get('page');
             }, this.notifications.showErrors);
         }
 
-        return !!this.get('page');
+        return this.get('page');
     }.property('page'),
 
     newSlugBinding: Ember.computed.oneWay('slug'),

core/server/config/url.js

@@ -65,7 +65,7 @@ function urlPathForPost(post, permalinks) {
             id: function () { return post.id; }
         };
 
-    if (post.page === 1) {
+    if (post.page) {
         output += '/:slug/';
     } else {
         output += permalinks.value;

core/server/controllers/frontend.js

@@ -240,7 +240,7 @@ frontendControllers = {
             // then the post must be a static post.
             // If it is not then we must return.
             if (usingStaticPermalink) {
-                if (post.page === 1) {
+                if (post.page) {
                     return render();
                 }