Missing dialogData
Missing dialogData

As mentioned here:
https://www.proworks.com/blog/archive/how-to-pass-data-to-the-umbraco-7-dialogservice-on-open/

And shown in the core here:
https://github.com/umbraco/Umbraco-CMS/blob/dev-v7/src/Umbraco.Web.UI.Client/src/common/services/dialog.service.js#L92
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