Fixed the icon on the expand/collapse button for reviews.
Fixed the icon on the expand/collapse button for reviews.

I recently fixed the icon for the button on change descriptions, but was
missing a single line for reviews. This adds it, providing the proper
state for the button.

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