Notification channels page doesn't list any resources

[stevenbal]

Not a high priority issue as far as I know, but the notifications channel page (located at `<base_url>/ref/kanalen/) doesn't list resources anymore

Before v2 this is what was shown:

I would expect the resources that support notifications (ObjectRecord) for the defined kanaal objecten to be shown here

[stevenbal]

@annashamray I noticed here that the __init__ was overridden without adding the channel to the registry, was there a specific reason for this?

[annashamray]

@stevenbal I think I overrode it because v2/ endpoints were added. No idea why the channel is not added to the registry anymore, I'll take a look

[stevenbal]

I was checking what happens when I add the channel to the registry and navigate to the kanalen page, it turns out that makes it crash because it tries to create the description, but the kenmerk object_type is not an attribute of ObjectRecord