Better organization and bulk operation with keyword lists#85

I would really appreciate to sort the keyword lists in a better way. For instance, if you have multiple keyword lists for one topic cluster it would be great to organize them in folders.

Tobias Hagemeister: “If you have quite a lot saved keyword lists, it takes some times to clean them up. A bulk selection to delete the keyword lists would be really nice inside KWFinder.” (transfered from merged post)