dont rerender date range when we dont need to. fixes #3598
dont rerender date range when we dont need to. fixes #3598

arshaw/fullcalendar,laoneo/fullcalendar,fullcalendar/fullcalendar,fullcalendar/fullcalendar,MeteorAdminz/fullcalendar,MeteorAdminz/fullcalendar,arshaw/fullcalendar,oleg-babintsev/fullcalendar,kleisauke/fullcalendar,oleg-babintsev/fullcalendar,pietervisser/fullcalendar,oleg-babintsev/fullcalendar,laoneo/fullcalendar,arshaw/fullcalendar,fullcalendar/fullcalendar,fullcalendar/fullcalendar,MeteorAdminz/fullcalendar,pietervisser/fullcalendar,kleisauke/fullcalendar,kleisauke/fullcalendar,laoneo/fullcalendar,pietervisser/fullcalendar,kleisauke/fullcalendar,MeteorAdminz/fullcalendar,arshaw/fullcalendar