Feature request: List files mixed with directories

[cstern]

Sometimes it is nice to have a truly alphabetical list of files and folders in the selection panes.

Now, the folders are listed first, then the individual files.

I suggest that it should be possible to list the entire contents of a directory truly alphabetical, i.e. if you have the folders A C and E and the files b d and f, the list could look either this way:

(as it is now):
A
C
D
b
d
f

or

(optionally
A
b
C
d
E
f