gant: fix support for firefox: doesn't support 01-01-2018 style dates (/ is supported by both chrome and firefox)
gant: fix support for firefox: doesn't support 01-01-2018 style dates (/ is supported by both chrome and firefox)

ozFri/rhizi,tlevine/rhizi,ozFri/rhizi,yuvadm/rhizi,Rhizi/rhizi,ozFri/rhizi,cben/rhizi,shlomif/rhizi,cben/rhizi,tlevine/rhizi,shlomif/rhizi,Rhizi/rhizi,yuvadm/rhizi,Rhizi/rhizi,shlomif/rhizi,cben/rhizi,Rhizi/rhizi,tlevine/rhizi,tlevine/rhizi,ozFri/rhizi,yuvadm/rhizi,shlomif/rhizi,yuvadm/rhizi,cben/rhizi