Clarify 'How it Ended' in Medical Events capture

Updated How it Ended to read Resolution/Treatment
Updated entry element to textarea same size as a comment block
No DB updates needed to accomodate updated input size
Updated validation scripts to no longer rely on input element, as it has become a textarea

Change-Id: I53513d67eb9bba30150b34158e00e7e533345ff1
Issue-Id: HEALTHEME-10
Merge "Clarify 'How it Ended' in Medical Events capture"