Messages widget data format changed

Currently Messages widget key format requires "key@labels" syntax rather than just "key"

Code Sample:
    {
        "key": "message_box@labels",
        "value": "[\"Mr. Keagan Lakin IV has closed 4 deals\"]"
    },
    {
        "key": "message_box@icons",
        "value": "[\"Number\"]"
    }