This section of the dashboard has always used a query that includes
"-age:4w limit:10", presumably to keep this section short and focused on
recent work.
The fix for issue 6716 makes it so that the limit in the query plays
well with pagination when the user clicks on the section header to page
through the full results of the query. However, it doesn't follow that
the user wants to see only 10 results at a time limited to the past 4
weeks.
Therefore we add a new, optional property to section metadata to specify
a suffix that is applied only when executing the query to populate the
dashboard view. This allows us to leave an unrestricted query that
gr-change-list will use in the section header.
Bug: Issue 6762
Change-Id: I52102113f79d8847de320bbd1b48cc8578f5196b
2eaf8555e3