listbox.go
func (l *ListBox) RemoveItem(id int) bool {
	if id < 0 || id >= len(l.items) {
		return false
	}

	l.items = append(l.items[:id], l.items[id+1:]...)
	return true
}
func (l *ListBox) RemoveItem(id int) bool {
	if id < 0 || id >= len(l.items) {
		return false
	}

	l.items = append(l.items[:id], l.items[id+1:]...)
	return true
}
func ( l * ListBox ) RemoveItem ( id int ) bool { if id < 0 || id >= len ( l . items ) { return false } l . items = append ( l . items [ : id ] , l . items [ id + 1 : ] ... ) return true }
// RemoveItem deletes an item which number is id in item list
// Returns true if item is deleted
RemoveItem deletes an item which number is id in item list Returns true if item is deleted