Remove publish status reversion on failed save

Fixes #511

- Removed logic to revert publish status back to page default on error.

ghost/admin/views/editor.js

@@ -190,8 +190,6 @@
             }, function (xhr) {
                 // Show a notification about the error
                 self.reportSaveError(xhr, model, status);
-                // Set the button text back to previous
-                model.set({ status: prevStatus });
             });
         },