## 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/property_definition.py
TaggedItemViewSetMixin,
    StructuredViewSetMixin,
    mixins.ListModelMixin,
    mixins.RetrieveModelMixin,
    mixins.UpdateModelMixin,
    viewsets.GenericViewSet,
):
    serializer_class = PropertyDefinitionSerializer
    permission_classes = [permissions.IsAuthenticated, OrganizationMemberPermissions, TeamMemberAccessPermission]
    lookup_field = "id"
    filter_backends = [TermSearchFilterBackend]
    ordering = "name"
    search_fields = ["name"]
    pagination_class = NotCountingLimitOffsetPaginator
    def get_queryset(self):