Cannot keyboard-browse filelists properly

[timwi]

In the "Local site" pane, try the following:

* Navigate to C:\
* Set focus to the filelist
* Type the name of a directory (directory gets selected)
* Press Enter (it opens the directory)
* Now try to type the name a subdirectory

Expected behaviour: Should work select directory as typed.

Actual behaviour: Doesn't work.

Additional information:
Works after a delay. Presumably pressing ENTER doesn't reset the keystroke buffer. It should.