Unlink an item
void PtFSRemoveItem( PtWidget_t *fs, PtFileSelItem_t *item );
This function unlinks the given item together with its children from its parent and brothers (if any) and sets the item->parent and item->brother fields to NULL.
The fs argument must point to the PtFileSel widget containing the item, or be NULL if the item doesn't belong to any file selector.
|If fs is NULL and the item has no parent but has a
previous brother, the function won't be able to find the previous brother
and therefore can't unlink the item from its brother.
The function does nothing if
item->parent and fs are both
PtFSRemoveItem() never clears the Pt_TREE_ITEM_EXPANDABLE flag in the item's parent.