RTE filters do not work and break da-universal

[mhaack]

We need support for RTE filters to downfilter aka. remove options from RTE. A filter like below breaks da-universal.

"filters": [
    {
      "id": "hero",
      "rte": {
        "format": [
          "bold",
          "italic",
          "underline"
        ],
        "alignment": [],
        "indentation": [],
        "sr_script": [],
        "list": [],
        "insert": [],
        "advanced": [],
        "extensions": [],
        "editor": [],
        "blocks": []
      }
    }
  ]

[maximilianvoss]

@mhaack where is this a bug? There is a filter definition where you can strip this down

[mhaack]

It is maybe not supported :-) not a bug.