/// <summary>
/// Drag and drop the column at (sourcePosition) and move it to (targetPosition).
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public ColumnPickerPartial DragAndDropColumn(int sourcePosition, int targetPosition)
{
WebElement source = _driver.FindElement(ByMethod.CssSelector,
".modal-body ul[ui-sortable=sortableOptions] li:nth-child(" + sourcePosition + ") .mdi-drag-vertical");
WebElement target = _driver.FindElement(ByMethod.CssSelector,
".modal-body ul[ui-sortable=sortableOptions] li:nth-child(" + targetPosition + ") .mdi-drag-vertical");
int offsetY = target.Location.Y - source.Location.Y;
source.DragAndDropTo(_driver, 0, offsetY + 10);
return(this);
}