Content Fragments: Multifield support

[#1]

Request for Feature Enhancement (RFE) Summary:	Add multifield support to content fragments
Use-case:	Sometimes, using nested content fragments just makes no sense to editors. Our case: making a cooking recipy. We'd like to break down the recipy into steps necessary to make a meal component (such as: mashed potatoes) including ingredients, and we have no need of reuse. If we'd split off the fragments into a seperate fragment, life for content editors becomes a lot more difficult - it's much easier for them to fill in everything inside of a single fragment view.
Current/Experienced Behavior:	No multifield is available in content fragments
Improved/Expected Behavior:	We have multifield available in content fragments, including the option to configure them in the model editor
Environment Details (AEM version/service pack, any other specifics if applicable):	All versions (but we're on 6.5 on-prem)
Customer-name/Organization name:	AmeXio (system integrator)
Screenshot (if applicable):
Code package (if applicable):

[#2]

It's strange anyway, that multifields are there in ClassicUI dialogs, in TouchUI dialogs, but not in AEM Assets properties(?) and not in the content fragment editor.

[#3]

@rogier-oudshoorn 

Thanks for proposing this idea

This has been reported to the engineering under the internal reference SITES-16566. The product team will triage this request to verify feasibility based on the prioritization model. This post will be updated according to the Jira request status.