AngularJS upgrade regression fix.
AngularJS upgrade regression fix.

The $translate service throws up an error when lookup for a non-existing
translation ID (i18n key) is made.

To solve, made 2 fixes:
1. Always lookup for an existing translation ID to ensure the translation
   tables are loaded.

2. Catch the error and report to users.

krishagni/openspecimen,krishagni/openspecimen,krishagni/openspecimen