Treat FUSE_SUPER_MAGIC as Other instead of Nfs
requested to merge marcingu/k-core-addons-dont-treat-encrypted-devices-as-slow:marcingu-kcoreaddons-dont-treat-encrypted-devices-as-slow into master
Encrypted devices were being treated as slow due to Nfs being returned as their file type. This caused thumbnails to not be showed when browsing encrypted devices such as Plasma Vaults.