Wrong redirection when view/editing Option Groups inside a modal

This seems like a regression caused by #259 (closed).

Before it, when opening the Option Group page via a modal, the behavior of clicking the "Done" button was to just close the modal so that people could continue filling the form:

After it, when clicking the "Done" button, the user is now redirected to the Option Groups page and lose all the data they might have already entered:

I've submitted a PR with a proposed fix https://github.com/civicrm/civicrm-core/pull/13312

mentioned in commit c345eefe

changed milestone to %5.9

this has been merged - closing

closed