RA-1916: Coalesce multiple answers recorded for the same question on ObsAcrossEncounters widget. (#412)
* Coalesce multiple answers recorded for the same question on ObsAcrossEncounters widget
* Fixed issue causing comma to sometimes occupy an whole line
* Fixed ObsAcrossEncounters unit tests
* Added unit test for when there are two answer obs for same concept
* Fixed unit test for when there are two answer obs for same concept
* ObsAcrossEncounters widget cleanup
* Fixed indentation on ObsAcrossEncounters widget controller