setSelectedRow does not set selected css "selected" state.

Describe the bug

Under certain circumstances, calling grid.setSelectedRows effectively set the selected row, but fail to set the "selected" css attribute on cells

Reproduction

the code below try to add to a generic div container a grid, set the selection model, then data, the try to set selected row on the first row. this should set the "selected" class to the cells/rows, but it does not. Steps: 1) Create a test page with a simple div element sizing it to be visible and large enough 2) on the load document invoke the code below. Please take into consideration that Slick library is "namespaced" with the Slick identifier, maybe you should fix this to match your env. 3) After the page is rendered you should see a grid, with one row, selected.

There is no rows with selected style. If you ispect the grid HTML DOM there is no html node with "selected" style applyed I'm not sure it's a bug. Maybe i'm doing something wrong? Is there some other thing to do to get the row highlighted as selected?

`private makeGrid(container: HTMLElement): void { let data: any[] = [{ firstName: 'Henry', lastName: 'FORD' }]; let columns: Slick.Column[] = [{ id: 'firstName', name: 'First Name', field: 'firstName', width: 90, selectable: true }, { id: 'lastName', name: 'Last Name', field: 'lastName', width: 190, selectable: true }];

let input = $("<div style='width:300px; height:400px; background-color:pink'></div>").get(0);
$(input).appendTo(container);

let options: Slick.GridOption = {
    enableCellNavigation: true,
    enableColumnReorder: false,
    asyncEditorLoading: true,
    editable: true
};

let grid = new Slick.SlickGrid(input, [], columns, options);

grid.setSelectionModel(new Slick.SlickRowSelectionModel());

grid.setData(data);
grid.setSelectedRows([0]);

grid.invalidate();
grid.render();

Which Framework are you using?

Vanilla / Plain JS

Environment Info

| Executable          | Version |
| ------------------- | ------- |
| (framework used)    | .Net Core|
| SlickGrid | 5.5.5 |
| TypeScript          | 5.3.2 |
| Browser(s)          | does not matter |
| System OS           | does not matter |

Validations

[X] Follow our Code of Conduct
[X] Read the Wikis.
[X] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
[X] Check that this is a concrete bug. For Q&A open a GitHub Discussion.
[X] The provided reproduction is a minimal reproducible example of the bug.

6pac / SlickGrid