## Is your feature request related to a problem?

As a team accumulates data, they will have events/properties that are no longer in use that clutter their app.

Example from our team:
![image](https://user-images.githubusercontent.com/148820/143202334-42d73ab6-13be-4661-ba7a-83c86788b9e8.png)


## Describe the solution you'd like

Under event/properties stats allow 'hiding' events/properties from view.

## Describe alternatives you've considered

Alternatively, go the route of "verified" events/properties (as He@p) does - show those first. See also https://help.heap.io/category/heap-administration/data-governance/

## Additional context

Note: Existing reports, etc should still work well even with 'removed' events/properties.

Related: https://github.com/PostHog/posthog/issues/7126

#### *Thank you* for your feature request – we love each and every one!

posthog/api/test/test_event_definition.py
EventDefinition.objects.bulk_create(
            [EventDefinition(team=self.demo_team, name=f"z_event_{i}") for i in range(1, 301)]
        )
        response = self.client.get("/api/projects/@current/event_definitions/")
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response.json()["count"], 306)
        self.assertEqual(len(response.json()["results"]), 100)  
        self.assertEqual(response.json()["results"][0]["name"], "$pageview")  
        self.assertEqual(response.json()["results"][1]["name"], "watched_movie")  
        event_checkpoints = [
            184,
            274,
            94,
        ]  
        
        for i in range(0, 3):
            response = self.client.get(response.json()["next"])
            self.assertEqual(response.status_code, status.HTTP_200_OK)
            self.assertEqual(response.json()["count"], 306)
            self.assertEqual(
                len(response.json()["results"]), 100 if i < 2 else 6
            )  
            self.assertEqual(response.json()["results"][0]["name"], f"z_event_{event_checkpoints[i]}")
    def test_cant_see_event_definitions_for_another_team(self):