refresh extra custom date fields on page load (#1929)
refresh extra custom date fields on page load (#1929)

fixes #1927
adriancole/zipkin,twitter/zipkin,twitter/zipkin,openzipkin/zipkin,openzipkin/zipkin,twitter/zipkin,twitter/zipkin,adriancole/zipkin,openzipkin/zipkin,adriancole/zipkin,adriancole/zipkin,openzipkin/zipkin,openzipkin/zipkin