Moved page model specific check into PageSerializer
Moved page model specific check into PageSerializer

jnns/wagtail,mixxorz/wagtail,hanpama/wagtail,kurtrwall/wagtail,JoshBarr/wagtail,gogobook/wagtail,JoshBarr/wagtail,inonit/wagtail,mixxorz/wagtail,tangentlabs/wagtail,gasman/wagtail,nimasmi/wagtail,zerolab/wagtail,FlipperPA/wagtail,hanpama/wagtail,takeshineshiro/wagtail,gasman/wagtail,quru/wagtail,zerolab/wagtail,nilnvoid/wagtail,rjsproxy/wagtail,timorieber/wagtail,mikedingjan/wagtail,wagtail/wagtail,takeflight/wagtail,wagtail/wagtail,nimasmi/wagtail,nrsimha/wagtail,WQuanfeng/wagtail,mixxorz/wagtail,FlipperPA/wagtail,wagtail/wagtail,rv816/wagtail,kurtrwall/wagtail,nilnvoid/wagtail,quru/wagtail,serzans/wagtail,thenewguy/wagtail,wagtail/wagtail,nealtodd/wagtail,torchbox/wagtail,Toshakins/wagtail,kurtrwall/wagtail,rsalmaso/wagtail,nrsimha/wagtail,wagtail/wagtail,gasman/wagtail,Klaudit/wagtail,mjec/wagtail,rv816/wagtail,kaedroho/wagtail,hamsterbacke23/wagtail,timorieber/wagtail,kurtw/wagtail,kurtrwall/wagtail,rsalmaso/wagtail,takeshineshiro/wagtail,tangentlabs/wagtail,JoshBarr/wagtail,Toshakins/wagtail,nimasmi/wagtail,Tivix/wagtail,Pennebaker/wagtail,kurtw/wagtail,torchbox/wagtail,iansprice/wagtail,torchbox/wagtail,tangentlabs/wagtail,hamsterbacke23/wagtail,gogobook/wagtail,gasman/wagtail,JoshBarr/wagtail,Pennebaker/wagtail,torchbox/wagtail,rv816/wagtail,kaedroho/wagtail,timorieber/wagtail,mjec/wagtail,rjsproxy/wagtail,takeshineshiro/wagtail,serzans/wagtail,chrxr/wagtail,FlipperPA/wagtail,timorieber/wagtail,inonit/wagtail,nealtodd/wagtail,mixxorz/wagtail,mikedingjan/wagtail,serzans/wagtail,jnns/wagtail,Klaudit/wagtail,iansprice/wagtail,mayapurmedia/wagtail,nealtodd/wagtail,Klaudit/wagtail,nimasmi/wagtail,takeflight/wagtail,takeflight/wagtail,takeshineshiro/wagtail,Tivix/wagtail,Klaudit/wagtail,kaedroho/wagtail,nilnvoid/wagtail,thenewguy/wagtail,thenewguy/wagtail,hamsterbacke23/wagtail,chrxr/wagtail,hanpama/wagtail,nutztherookie/wagtail,kaedroho/wagtail,kurtw/wagtail,mayapurmedia/wagtail,iansprice/wagtail,quru/wagtail,rsalmaso/wagtail,nutztherookie/wagtail,mjec/wagtail,rsalmaso/wagtail,kaedroho/wagtail,zerolab/wagtail,gogobook/wagtail,jnns/wagtail,FlipperPA/wagtail,quru/wagtail,gogobook/wagtail,nealtodd/wagtail,WQuanfeng/wagtail,gasman/wagtail,hamsterbacke23/wagtail,zerolab/wagtail,mjec/wagtail,davecranwell/wagtail,thenewguy/wagtail,davecranwell/wagtail,Tivix/wagtail,rjsproxy/wagtail,chrxr/wagtail,Tivix/wagtail,thenewguy/wagtail,rjsproxy/wagtail,hanpama/wagtail,mayapurmedia/wagtail,nrsimha/wagtail,mikedingjan/wagtail,inonit/wagtail,takeflight/wagtail,nilnvoid/wagtail,mikedingjan/wagtail,kurtw/wagtail,nrsimha/wagtail,nutztherookie/wagtail,davecranwell/wagtail,Pennebaker/wagtail,iansprice/wagtail,zerolab/wagtail,serzans/wagtail,rsalmaso/wagtail,davecranwell/wagtail,mixxorz/wagtail,rv816/wagtail,mayapurmedia/wagtail,Pennebaker/wagtail,jnns/wagtail,inonit/wagtail,nutztherookie/wagtail,tangentlabs/wagtail,chrxr/wagtail,Toshakins/wagtail,WQuanfeng/wagtail,WQuanfeng/wagtail,Toshakins/wagtail