Perform manual admin registration, as django-polymorphic 1.4+ requires.

This new registrarion system worked as of django-polymorphic 1.0,
and this deprecated feature was recently removed because it caused
subtle bugs.

Author: vdboor

Diff for: fluent_faq/pagetypes/faqpage/admin.py

@@ -0,0 +1,10 @@
+from django.contrib import admin
+from fluent_pages.adminui import HtmlPageAdmin
+
+from .models import FaqPage
+
+
+@admin.register(FaqPage)
+class FaqPageAdmin(HtmlPageAdmin):
+    pass
+

Diff for: fluent_faq/pagetypes/faqpage/page_type_plugins.py

@@ -1,5 +1,5 @@
-from fluent_pages.adminui import HtmlPageAdmin
 from fluent_pages.extensions import page_type_pool, PageTypePlugin
+from .admin import FaqPageAdmin
 from .models import FaqPage
 
 
@@ -9,5 +9,5 @@ class FaqPagePlugin(PageTypePlugin):
     Plugin binding the FaqPage model as pagetype.
     """
     model = FaqPage
-    model_admin = HtmlPageAdmin
+    model_admin = FaqPageAdmin
     urls = 'fluent_faq.urls'