Changes done using “Expert Mode” with Post Relationship forms are not saved

Symptoms

If you use the Expert mode while editing a Post Relationship form, the changes you do are not saved.

Workaround

This issue will be fixed in a future release. Until then, this patch can be used by unzipping it and uploading the file it contains, to replace the one with the same name, located in /public/association_forms/js/editor_page/AssciationFormViewModel.js.