fileselectdlg.go
func (d *FileSelectDialog) pathUp() {
	dirUp := filepath.Dir(d.currPath)
	if dirUp == d.currPath {
		return
	}
	d.currPath = dirUp
	d.populateFiles()
	d.selectFirst()
}
func (d *FileSelectDialog) pathUp() {
	dirUp := filepath.Dir(d.currPath)
	if dirUp == d.currPath {
		return
	}
	d.currPath = dirUp
	d.populateFiles()
	d.selectFirst()
}
// Goes up in the directory tree if it is possible