Correct behaviour for trailing slashes

fixes #2741
- Extend HistoryLocation
- Add trailing slash to path

ghost/admin/app.js

@@ -2,6 +2,7 @@ import Resolver from 'ember/resolver';
 import initFixtures from 'ghost/fixtures/init';
 import {currentUser, injectCurrentUser} from 'ghost/initializers/current-user';
 import {registerNotifications, injectNotifications} from 'ghost/initializers/notifications';
+import registerTrailingLocationHistory from 'ghost/initializers/trailing-history';
 import 'ghost/utils/link-view';
 import 'ghost/utils/text-field';
 
@@ -24,5 +25,6 @@ App.initializer(currentUser);
 App.initializer(injectCurrentUser);
 App.initializer(registerNotifications);
 App.initializer(injectNotifications);
+App.initializer(registerTrailingLocationHistory);
 
 export default App;

ghost/admin/initializers/trailing-history.js

@@ -0,0 +1,23 @@
+/*global Ember */
+
+var trailingHistory = Ember.HistoryLocation.extend({
+    setURL: function (path) {
+        var state = this.getState();
+        path = this.formatURL(path);
+        path = path.replace(/\/?$/, '/');
+
+        if (state && state.path !== path) {
+            this.pushState(path);
+        }
+    }
+});
+
+var registerTrailingLocationHistory = {
+    name: 'registerTrailingLocationHistory',
+
+    initialize: function (container, application) {
+        application.register('location:trailing-history', trailingHistory);
+    }
+};
+
+export default registerTrailingLocationHistory;

ghost/admin/router.js

@@ -4,7 +4,7 @@
 var Router = Ember.Router.extend();
 
 Router.reopen({
-    location: 'history', // use HTML5 History API instead of hash-tag based URLs
+    location: 'trailing-history', // use HTML5 History API instead of hash-tag based URLs
     rootURL: '/ghost/ember/' // admin interface lives under sub-directory /ghost
 });