Enable django v2 style autocomplete fields in admin

pgweb/contributors/admin.py

@@ -15,6 +15,7 @@ class ContributorAdminForm(forms.ModelForm):
 
 class ContributorAdmin(admin.ModelAdmin):
     form = ContributorAdminForm
+    autocomplete_fields = ['user', ]
 
 
 admin.site.register(ContributorType)

pgweb/core/admin.py

@@ -21,6 +21,7 @@ class OrganisationAdmin(admin.ModelAdmin):
     list_filter = ('approved',)
     ordering = ('name', )
     search_fields = ('name', )
+    autocomplete_fields = ['managers', ]
 
 
 class VersionAdmin(admin.ModelAdmin):