Tickets #1610, #1949: show permalinks on Popular Notices, attachments aside sections
These mini notice lists were previously not actually showing links to the notices, making them hard to use. There was code to output a link, but it had been unused due to the config options triggering it not being set. The links also looked bad ("( see )" with bad spacing). Replaced that code with a call into NoticeListItem's existing code to format a relative timestamp with the notice permalink, which looks nice. Used a div rather than p to avoid clearing the float, so it flows nicely.
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