[TW-181] extend column indicator format to more fields

_David Patrick on 2013-08-13T19:40:51Z says:_

So far four fields (?) can be represented by "indicator"; active, dependent, recurring and with-tags, with *,D,R,+ as corresponding default characters.

This request is to extend the indicator formatting option to several (many? all?) other attributes, including, but not limited to due, sched, until and wait.
An indicator makes no sense for an attribute that is always present, like entry, or description.