Fix update notifications on review UI pages.
Review UI pages never had the last activity timestamp set for the review

request, which meant that within a few minutes of viewing the page, an

update notification would display. This passes that variable in the

context for the page.

Temporarily set the timestamp for 5 seconds. Before the change, an update notification

would appear after those 5 seconds, showing the last activity (made prior to viewing the

page). After the change, that didn't happen, and the HTML source had a valid timestamp

set, just like the other pages.