templates: nicer display for ALICE files

[tiborsimko]

The display of ALICE files now looks as follows:

This is because the filenames are the same, only the directories differ:

/eos/opendata/alice/2010/LHC10b/000117222/ESD/0000/AliESDs.root
/eos/opendata/alice/2010/LHC10b/000117222/ESD/0001/AliESDs.root

We should show the least amount of information but in such a way that it would uniquely identify the files, e.g. the filename and the directory name.