new DataGridXL(Id) should replace Dom node, not append

[DataGridXL]

[DataGridXL]

Whenever we build a DataGridXL instance with const grid = new DataGridXL("grid", {...}), we assign the property .instance to the grid container DOM Node.

<div id="grid"></div>
console.log(document.getElementById('grid')?.instance)` // will return DGXL instance if set

We can check if instance is set, destroy it, only then make a new one!

[DataGridXL]

Fixed.