Bug 17465: NumSavedReports syspref

Bug 17465: NumSavedReports syspref

To test:
1) Apply patch and update database
2) Go to system preferences. Default value should be 20 reports.
3) Go to Reports -> Use saved. Confirm 20 results are showing
4) Change value in syspref to any integer (i.e. 50)
5) Go back to Reports -> Use saved. Confirm the number of results shown
is based on the value in the syspref.

Sponsored-by: Catalyst IT
Followed test plan, works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>