Listing mode "bsize" and "Show Directory Sizes"

[Krzysztof Trybowski <trybowski-arc aeropolis pl>]

Hello all,
here's a suggestion: I prefer "bsize" to "size" in my panels, because
directory size means nothing to me.

However, when I press Ctrl-Space on a directory, to calculate the size
of the whole tree that lies under there, I'd still like to have the
size displayed. Currently using "bsize" makes it impossible to use
"Show Directory Sizes".

I'm testing in MC 4.8.3.

-- 
Pozdrowienia,
 Krzysztof Trybowski