Skip relayout if auto_dimensions are off.

Author: =

src/textual/widgets/_option_list.py

@@ -373,7 +373,7 @@ def add_options(self, new_options: Iterable[OptionListContent]) -> Self:
                 self._id_to_option[option._id] = option
             add_option(option)
         if self.is_mounted:
-            self.refresh(layout=True)
+            self.refresh(layout=self.styles.auto_dimensions)
             self._update_lines()
         return self