Make typeahead data stores readable

[calexh-sar]

Currently typeahead data stores can only be accessed by a User Task form field configuration and don't appear in the process diagram. Often there is useful information in the data store which would be useful if it could be accessed like the other data stores are, i.e., added to the diagram with a data input association. Work on this issue will allow typeahead data stores to be accessed and data extracted.

[calexh-sar]

@harmeet-status lowered priority since no longer needed for User Preference Data Store.