add js setting to make flash messages persist
add js setting to make flash messages persist

bidah/storytime-manentail,CultivateLabs/storytime,matiasgarcia/storytime,CultivateLabs/storytime,bidah/storytime-manentail,hoanghiep90/storytime,harrykiselev/storytime,hoanghiep90/storytime,braindeaf/storytime,matiasgarcia/storytime,braindeaf/storytime,FlyoverWorks/storytime,hoanghiep90/storytime,bidah/storytime-manentail,CultivateLabs/storytime,harrykiselev/storytime,braindeaf/storytime,harrykiselev/storytime,matiasgarcia/storytime,FlyoverWorks/storytime,FlyoverWorks/storytime