Allow multiple mappings to the collection field

[igarashitm]

[igarashitm]

One question here is, where to drop. ATM we cannot distinguish if user wants to concatenate name1 and name2, or create a 2nd mapping as above.

[igarashitm]

From Bruno - we can introduce an intermediate action, duplicate to the collection target field

We might also want to automatically "duplicate" when user adds "for-each". ATM once user adds "for-each", the collection field is nested under "for-each" element, so it's less visible when user wants to add the 2nd mapping.