[OE-5156] - migration for further findings element
[OE-5156] - added testdata in migration, added Further Findings Model and Assignments plus unit tests
[OE-5156] - initial working further findings
[OE-5156] - complete further finding including fixes to unit tests
[OE-5156] - amended getLetter_string in Diagnoses in order to pull in further findings
[OE-5156] - remove not required hidden field causing bugs
[OE-5157] allow diagnoses element to be saved without any diagnoses
Merge branch 'feature/glaucoma-2.1' into g21develop