Drop 2x unused imports
Avoid over aggressive caching after review recipients changed

The HTTP ETag for a review front page remained constant even though
the list of recipients had changed. This meant that the "Recipient List:"
field wasn't updated properly when the review page reloaded after
a user had clicked the "Exclude me, please!" (or include) button.
Avoid over aggressive caching after reviewer/watcher set changed
Avoid over aggressive caching after custom filter is [remove]d
Avoid over aggressive caching after review owner changed
Close "Edit Owners" dialog on ENTER