Fix the rendering of the Manual Updates page.
Fix the rendering of the Manual Updates page.

A recent regression caused this page to render the wrong templates for
the update notifications. We now properly show the correct template.

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