Fix local import of select_figure_formats.

Fixes issue with setting InlineBackend.figure_format config value,
reported on mailing list.

Author: takluyver

config.py

@@ -71,10 +71,10 @@ def _config_changed(self, name, old, new):
 
     def _update_figure_formatters(self):
         if self.shell is not None:
+            from IPython.core.pylabtools import select_figure_formats
             select_figure_formats(self.shell, self.figure_formats, **self.print_figure_kwargs)
 
     def _figure_formats_changed(self, name, old, new):
-        from IPython.core.pylabtools import select_figure_formats
         if 'jpg' in new or 'jpeg' in new:
             if not pil_available():
                 raise TraitError("Requires PIL/Pillow for JPG figures")