Sanitize the POST for the system/preferences/
Sanitize the POST for the system/preferences/

alexnantel88/symphony-2,johnpuddephatt/symphony-2,DavidForster/symphony-2,jensscherbl/symphony,symphonycms/symphony-2,mazedigital/jcilearn,jensscherbl/symphony,DeuxHuitHuit/symphony-2,alexnantel88/symphony-2,bauhouse/sym-todo-list,michael-e/symphony-2,BloodBrother/symphony-2,twiro/symphony-2,johnpuddephatt/symphony-2,DeuxHuitHuit/symphony-2,brendo/symphony-2,BloodBrother/symphony-2,michael-e/symphony-2,twiro/symphony-2,bauhouse/sym-todo-list,jurajkapsz/symphony-2,brendo/symphony-2,DavidForster/symphony-2,symphonycms/symphony-2,mazedigital/jcilearn,jurajkapsz/symphony-2,mazedigital/jcilearn