The intent of this is to allow for clearing errors after fields
load (e.g. a "field loading" message if the user attempts to continue
past the step when a field hasn't yet finished loading).
* src/dapi/DataApiManager.js (getApiData): Emit fieldLoaded after
request completes.
* test/dapi/DataApiManagerTest.js: Add test case.
DEV-2299
This will allow it to know when a request needs to be re-made at a later
time.
* src/dapi/DataApiManager (fieldStale, isFieldStale): Added
(fieldNotReady): Check stale status of field