[Grid] Weird behaviour when setting store.data with syncDataOnLoad & grouping on

[eangelov]

We start with the grouping example modify it a little so that syncDataOnLoad is on:

store: {
	data : DataGenerator.generateData(50)
	, syncDataOnLoad: true
}

Steps:

1. Collapse all groups
2. Open the console and set store.data

grid.store.data = [{
    "id": 1,
    "title": "Row 0",
    "name": "Don A Taylor",
    "firstName": "Don",
    "surName": "Taylor",
    "city": "Moscow",
    "team": "Paris Tigers",
    "age": 30,
    "food": "Salad",
    "color": "Black",
    "score": 880,
    "rank": 99,
    "start": "2019-02-05T22:00:00.000Z",
    "finish": "2019-02-20T22:00:00.000Z",
    "time": "2020-01-01T00:10:00.000Z",
    "percent": 13,
    "done": false,
    "rating": 2,
    "relatedTo": 3,
    "notes": "Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur?"
}];

The result is that all the groups remain:

Now refresh the page and do the same as above except DO NOT collapse all groups before setting store.data and the result is that only 1 group remains

It seems that when setting store.data if the group is collapsed it is not updated property.