subfolders sorter not good

the IMCE's windows have a first area where you can see the files's list
and a second area where you can see the images;also in this area there is a small popup for to see
subfolders if you have maked;

so in
Directory: files/
I have some subfolders
but they are listed not in order (really if Operative System is windows they are)
So think is necessary to do some small change at js code that manage this list.