Merge branch 'hotfix/fix_ajax_page_edit' into 2.5
Fix Page Parents serialization

- Only save the Parent ID in the serialized object
- if Parent page is array, use id field if available
Merge branch 'hotfix/fix_page_parent_serialization' into 2.5
Merge branch 'hotfix/fix_page_parent_serialization'
Fix Include of ckeditor include to call as little as possible
Merge branch 'hotfix/fix_ckeditor_include'