Condition list -- deactivated conditions default end date is "undefined"

On condition list page, when you click “edit” on an active condition, access the edit page, select the “Inactive” radio, the end date is displayed and is “Undefined”. Click to enter the end date and the value defaults to “31 Dec 1899”. It shouldn't be "Undefined" and should default to current_timestamp?

Attention: ball haripriya

NOTE from Ellen:  The problem is with onset date.  Is end date also a problem?