Hide the Repository field if not using a repository.
Hide the Repository field if not using a repository.

The new field code regressed the visibility of the Repository field when
no repository was found. We now hide it if there isn't a repository on
that review request.

reviewboard/reviewboard,1tush/reviewboard,brennie/reviewboard,beol/reviewboard,1tush/reviewboard,davidt/reviewboard,beol/reviewboard,sgallagher/reviewboard,bkochendorfer/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,custode/reviewboard,1tush/reviewboard,brennie/reviewboard,1tush/reviewboard,KnowNo/reviewboard,reviewboard/reviewboard,1tush/reviewboard,davidt/reviewboard,custode/reviewboard,sgallagher/reviewboard,brennie/reviewboard,sgallagher/reviewboard,davidt/reviewboard,beol/reviewboard,1tush/reviewboard,bkochendorfer/reviewboard,1tush/reviewboard,sgallagher/reviewboard,KnowNo/reviewboard,custode/reviewboard,chipx86/reviewboard,beol/reviewboard,bkochendorfer/reviewboard,brennie/reviewboard,bkochendorfer/reviewboard,chipx86/reviewboard,1tush/reviewboard,KnowNo/reviewboard,custode/reviewboard,1tush/reviewboard,davidt/reviewboard,KnowNo/reviewboard