Bug 23315: Some systempreferences can not be edited
To test
1/ Go to systempreferences
2/ Notice that SelfCheckHelpMessage IntranetmainUserblock
IntranetCirculationHomeHTML IntranetReportsHomeHTML
StaffLoginInstructions are not editable
3/ Apply patch, refresh page
4/ Now they can be edited
Signed-off-by: Owen Leonard <oleonard@myacpl.org> Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl> Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>