add getDetails function to filesystem backend

Signed-off-by: Aaron Murray <plugins@omv-extras.org>

usr/share/php/openmediavault/system/filesystem/remote.inc

@@ -105,6 +105,11 @@ class Remote implements FilesystemInterface, SharedFolderCandidateInterface
         return $this->getDeviceFile();
     }
 
+    public function getDetails()
+    {
+        return '';
+    }
+
     /**
      * Get the description of the file system.
      *