[Design] Command-line for dummies

[Philippe Bossut]

Heikki Toivonen wrote:

>If the focus is in the summary view, I think I would expect typing to
>move the focus to an item that matches what I have written so far.
>
+1 on having support for typed navigation in list.

This is something not supported by Thunderbird (on Mac) and I miss it 
dearly.
Also needs to mention that the column used (when typing) is the sorting 
column.

Cheers,
- Philippe