Fix information leak: In response period, a PC author could see author-hidden review fields thru search.

John Heidemann report.
Correct formula bug: don't call nonexistent function.

Introduced in 314c80b2772a79b57e19609b95b9bcc7df1df6b5.
Use symbolic names for view scores, not bare integers.
UI nit: Don't report a conflict when saving a review if admin has already overridden conflict.
Hide review rounds from paper authors.

John Heidemann report.