Fix KFileItemPrivate::isSlow for fuse mount
Currently KFileItem::isSlow
is broken for FUSE mounts because it will always assume it's slow due to KFileSystemType
returning Nfs
even when it's completely different filesystem (eg. NTFS).
More correct implementation is using KMountPoint
and it works correctly :)
User visible change is that currently if you mount NTFS filesystem and in Dolphin open on Properties for some file there is no "Details" tab and also tooltip information doesn't load. This MR fixes that.