Partition Dimensions: change the result type to "Partition dimensions"

Need to check side effects before doing this change.

Also check the way that the valid file name is generated:

• may be useful to add corpus name in all auto-generated result file names
• check that we can use "@" with the 3 OS. Otherwise replace the "@" characters by "_" or something else instead of removing them. For now, it leads to some things like "textloc" in the names
• replace all spaces by underscore?