Add Saved "Collections" to Custom Activity Editor

[tonyanziano]

It would be a great feature to allow users to save custom activities to a "collection" much like Postman allows users to save and organize sent requests.

Sometimes the custom activities that are sent via the editor are quite large or intricate, and being able to repopulate them from the UI without copy/pasting the JSON would improve this work flow.

[pscompa]

I agree with you!