add missing method

pwman/ui/baseui.py

@@ -351,6 +351,9 @@ class BaseCommands(HelpUIMixin, AliasesMixin, BaseUtilsMixin):
             if re.search(r'^\d{4}$', umask):
                 os.umask(int(umask))
 
+    def do_cls(self, args):
+        pass
+
     def do_exit(self, args):  # pragma: no cover
         """close the text console"""
         self._db.close()