Group referring to non-existing chart shows angular markup

I introduced the corruption as described in MB-35786. This timeI modified the group definition to look like this:

    {

      "name": "Server Resources",

      "charts": [

        "ztxdr0wpqxxx",

        "jhuxtq3qu",

        "zi4g6bxc1",

        "2m2561kb9"

      ],

      "preset": true,

      "id": "b94sqs7hf"

    },

Resulting UI looks like this:

Would be nice to see:

• no angular markup
• "Chart not available"