Bug - TreeViewDataItem - customBadgeContent of number 0 is overwriten

[adamviktora]

Describe the problem

If we provide value of number 0 to a customBadgeContent property of TreeViewDataItem component, the value is ignored - instead the number of children of that TreeViewDataItem is displayed.

The issue is in TreeViewListItemBase:

<Badge {...badgeProps}>
    {customBadgeContent ? customBadgeContent : (children as React.ReactElement<any>).props.data.length}
</Badge>