`..` item in directory browser is a bit awkward to use with keyboard

[driver1998]

Say I want to go two directories up, I can't just choose '..' and hit enter twice. The second enter would be eaten.

I have to select '..' once, move up or down with cursor key, and go back to '..' and press enter again.

[aspizu]

The Backspace key does the same as what selecting .. does.

[Dustymind]

This problem was introduced in e5fcb0b
It also happens with other items.

[stuaxo]

Would it be possible to add alt-up to go up a directory as well as backspace?

This is used in Windows Explorer, Gnome files (Nautilus) as well as the K Desktop Environment.