Add central file download function for use throughout the GUI.
Add central file download function for use throughout the GUI.

dennypage/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,phil-davis/pfsense,phil-davis/pfsense,dennypage/pfsense,dennypage/pfsense,pfsense/pfsense,pfsense/pfsense,NewEraCracker/pfsense,pfsense/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,pfsense/pfsense,dennypage/pfsense