Add post modify view

This allows moderators to modify posts (add sticky, etc).

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/urls.py

@@ -20,6 +20,8 @@ urlpatterns = [
     path("ban/<slug:url>/<int:id>/", BanCreateView.as_view(), name="ban_create"),
     path("ban/success/", BanSuccessView.as_view(), name="ban_success"),
     path("banned", BannedView.as_view(), name="banned"),
+    # Other moderation pages
+    path("modify/<int:pk>/", PostModifyView.as_view(), name="post_modify"),
 ]
 # TODO - make this conditional so we can serve images up with whatever server we want
 urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)