test that pre/post delete signals are fired on the classes we're interested in
test that pre/post delete signals are fired on the classes we're interested in

KimGlazebrook/wagtail-experiment,davecranwell/wagtail,rjsproxy/wagtail,takeflight/wagtail,darith27/wagtail,rv816/wagtail,torchbox/wagtail,zerolab/wagtail,jnns/wagtail,thenewguy/wagtail,KimGlazebrook/wagtail-experiment,gogobook/wagtail,FlipperPA/wagtail,wagtail/wagtail,darith27/wagtail,dresiu/wagtail,JoshBarr/wagtail,m-sanders/wagtail,inonit/wagtail,mikedingjan/wagtail,Klaudit/wagtail,nealtodd/wagtail,taedori81/wagtail,mikedingjan/wagtail,kurtw/wagtail,Tivix/wagtail,iho/wagtail,taedori81/wagtail,timorieber/wagtail,nealtodd/wagtail,Pennebaker/wagtail,nealtodd/wagtail,thenewguy/wagtail,nealtodd/wagtail,Toshakins/wagtail,darith27/wagtail,nutztherookie/wagtail,rjsproxy/wagtail,kurtw/wagtail,Toshakins/wagtail,takeflight/wagtail,mayapurmedia/wagtail,nimasmi/wagtail,mjec/wagtail,Pennebaker/wagtail,rv816/wagtail,Tivix/wagtail,bjesus/wagtail,rv816/wagtail,Pennebaker/wagtail,serzans/wagtail,janusnic/wagtail,taedori81/wagtail,kurtrwall/wagtail,gasman/wagtail,zerolab/wagtail,janusnic/wagtail,davecranwell/wagtail,FlipperPA/wagtail,gasman/wagtail,hamsterbacke23/wagtail,dresiu/wagtail,darith27/wagtail,serzans/wagtail,marctc/wagtail,iansprice/wagtail,rsalmaso/wagtail,m-sanders/wagtail,rsalmaso/wagtail,jordij/wagtail,nutztherookie/wagtail,iho/wagtail,timorieber/wagtail,iansprice/wagtail,kaedroho/wagtail,marctc/wagtail,JoshBarr/wagtail,dresiu/wagtail,tangentlabs/wagtail,gogobook/wagtail,timorieber/wagtail,quru/wagtail,WQuanfeng/wagtail,nilnvoid/wagtail,gogobook/wagtail,tangentlabs/wagtail,serzans/wagtail,gasman/wagtail,Tivix/wagtail,jorge-marques/wagtail,tangentlabs/wagtail,inonit/wagtail,WQuanfeng/wagtail,mixxorz/wagtail,gasman/wagtail,chrxr/wagtail,zerolab/wagtail,mjec/wagtail,stevenewey/wagtail,inonit/wagtail,takeflight/wagtail,nilnvoid/wagtail,Toshakins/wagtail,kurtrwall/wagtail,wagtail/wagtail,wagtail/wagtail,mayapurmedia/wagtail,inonit/wagtail,thenewguy/wagtail,torchbox/wagtail,rsalmaso/wagtail,jordij/wagtail,mjec/wagtail,JoshBarr/wagtail,jordij/wagtail,jnns/wagtail,nutztherookie/wagtail,jorge-marques/wagtail,chrxr/wagtail,torchbox/wagtail,hanpama/wagtail,Toshakins/wagtail,rjsproxy/wagtail,nutztherookie/wagtail,quru/wagtail,WQuanfeng/wagtail,takeshineshiro/wagtail,FlipperPA/wagtail,nrsimha/wagtail,stevenewey/wagtail,hanpama/wagtail,timorieber/wagtail,davecranwell/wagtail,Klaudit/wagtail,jnns/wagtail,rsalmaso/wagtail,takeshineshiro/wagtail,quru/wagtail,hanpama/wagtail,tangentlabs/wagtail,mayapurmedia/wagtail,hamsterbacke23/wagtail,JoshBarr/wagtail,mephizzle/wagtail,Klaudit/wagtail,janusnic/wagtail,gasman/wagtail,chrxr/wagtail,mjec/wagtail,quru/wagtail,dresiu/wagtail,KimGlazebrook/wagtail-experiment,jnns/wagtail,mixxorz/wagtail,hamsterbacke23/wagtail,jorge-marques/wagtail,nrsimha/wagtail,stevenewey/wagtail,wagtail/wagtail,bjesus/wagtail,rjsproxy/wagtail,iansprice/wagtail,hamsterbacke23/wagtail,rsalmaso/wagtail,nrsimha/wagtail,serzans/wagtail,mixxorz/wagtail,bjesus/wagtail,kurtrwall/wagtail,iansprice/wagtail,janusnic/wagtail,mephizzle/wagtail,hanpama/wagtail,thenewguy/wagtail,iho/wagtail,kurtrwall/wagtail,kaedroho/wagtail,nilnvoid/wagtail,gogobook/wagtail,wagtail/wagtail,nimasmi/wagtail,jorge-marques/wagtail,torchbox/wagtail,mephizzle/wagtail,m-sanders/wagtail,nilnvoid/wagtail,kurtw/wagtail,m-sanders/wagtail,dresiu/wagtail,nrsimha/wagtail,nimasmi/wagtail,marctc/wagtail,kaedroho/wagtail,takeshineshiro/wagtail,Klaudit/wagtail,kurtw/wagtail,nimasmi/wagtail,rv816/wagtail,FlipperPA/wagtail,iho/wagtail,chrxr/wagtail,kaedroho/wagtail,mephizzle/wagtail,mayapurmedia/wagtail,mikedingjan/wagtail,marctc/wagtail,KimGlazebrook/wagtail-experiment,zerolab/wagtail,thenewguy/wagtail,Tivix/wagtail,taedori81/wagtail,mixxorz/wagtail,mikedingjan/wagtail,takeflight/wagtail,WQuanfeng/wagtail,jorge-marques/wagtail,zerolab/wagtail,mixxorz/wagtail,bjesus/wagtail,jordij/wagtail,kaedroho/wagtail,takeshineshiro/wagtail,stevenewey/wagtail,Pennebaker/wagtail,davecranwell/wagtail,taedori81/wagtail