refactor(wato-modes): check _clone for None explicitly

Change-Id: Iff29b92d0d978aeb0f4c60dfc0f5750e6f0d68c3

Author: otAAAh

cmk/gui/wato/pages/_simple_modes.py

@@ -804,11 +804,11 @@ def _get_render_settings(self) -> tuple[Any, DataOrigin, DoValidate]:
                 True,
             )
 
-        if self._new and not self._clone:
+        if self._new and self._clone is None:
             # New form, no validation
             return DEFAULT_VALUE, DataOrigin.DISK, False
 
-        if self._clone:
+        if self._clone is not None:
             self._ident = self._clone
 
         # Existing entry from disk