Enhancement : multiple names for icons

[erikdubois]

On ArchMerge Sardi and Surfn are included. Both can be managed by me. But Papirus, Numix and so many more can not be managed by me. Choosing the proper name for every possible icon theme out there is not possible. Could it be a good idea to include several icon names. If the first is not found, then the next is going to be tried and so on. {item => ["gksudo thunar", 'File Manager As Root', 'thunar' 'file manager' 'nautilus' 'nemo']},