better conflict resolution
==============
When dragging files onto a folder,
sometimes there is a name conflict with the files that are already there.
I would like to know if the file is the same with regard to the cryptographic hashes that are taken.
If the files are actually the same (hash compare), then I don't need to re-upload this file. (just skip)

if they're different and just the name is the same, do an automatic rename or show a warning. (can set automatic actions in the prefs)

When I'm out of wuala disk space, and still I drag a few files to a folder, 
if those files are exactly the same, disregard those ones, thus shortening the list, and recompute the total size of the shortened file list.
Maybe there is no space problem after all for the unique ones.

I would appreciate if this logic or a variant would be implemented.
Thank you