[OE-4745] changes to allow null relationships between common ophthalmic disorders and secondary-to disorders
[OE-4745] fixed bug where selecting None from the first dropdown then search for a diagnosis using the autocomplete would add "None" to the list as a diagnosis.
Merge branch 'feature/glaucoma-2.1' into jira/4745
Merge branch 'feature/glaucoma-2.1' into jira/4745
[OE-5088] - changed secondary to to associated with label
+ [OE-4745] bugfix for secondarytoimport command when resetting subspecialty.
+ [OE-4745] provide function for re-adding diagnoses to the primary list (support for examination requirements) and code clean up