StandardFacet for categories doesn’t work

[klodeckl]

I tried the following (to only have predefined categories as facets):

        \Fab\Vidi\Facet\StandardFacet::class => [
            'name' => 'categories',
            'label' => 'Kategorie',
            'suggestions' => [
                '156' => 'foo',
                '157' => 'bar'
            ]
        ],

But the facet doesn’t show at all. How to do that?

[mediaessenz]

Maybe this problem is different than it appears:
See #206