Bug 29648: Move NumSavedReports to the table settings

Bug 29648: Move NumSavedReports to the table settings

The syspref NumSavedReports can be moved to the table settings config
Test plan:
1. Set the syspref to a given value
2. updatedatabase # execute the atomic update
3. Go to the table settings page and confirm that the syspref's value
has been retrieved
4. Select a specific colonne for the default sort
5. Go to the report list view and confirm that the "Show X entries" has
the correct selected value and that the table is sorted as you expect.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>