Add safe maxListNesting default of 4
Add safe maxListNesting default of 4

mikedingjan/wagtail,nealtodd/wagtail,thenewguy/wagtail,wagtail/wagtail,thenewguy/wagtail,kaedroho/wagtail,nealtodd/wagtail,mixxorz/wagtail,zerolab/wagtail,timorieber/wagtail,mixxorz/wagtail,kaedroho/wagtail,gasman/wagtail,timorieber/wagtail,FlipperPA/wagtail,gasman/wagtail,gasman/wagtail,takeflight/wagtail,thenewguy/wagtail,jnns/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,wagtail/wagtail,takeflight/wagtail,takeflight/wagtail,wagtail/wagtail,gasman/wagtail,kaedroho/wagtail,timorieber/wagtail,mixxorz/wagtail,zerolab/wagtail,nimasmi/wagtail,kaedroho/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,nealtodd/wagtail,nealtodd/wagtail,timorieber/wagtail,FlipperPA/wagtail,torchbox/wagtail,FlipperPA/wagtail,jnns/wagtail,mikedingjan/wagtail,torchbox/wagtail,rsalmaso/wagtail,gasman/wagtail,nimasmi/wagtail,mixxorz/wagtail,takeflight/wagtail,nimasmi/wagtail,torchbox/wagtail,FlipperPA/wagtail,mikedingjan/wagtail,wagtail/wagtail,kaedroho/wagtail,zerolab/wagtail,mixxorz/wagtail,wagtail/wagtail,nimasmi/wagtail,zerolab/wagtail,thenewguy/wagtail,torchbox/wagtail,mikedingjan/wagtail,thenewguy/wagtail,jnns/wagtail,zerolab/wagtail,jnns/wagtail