code: def update_font(self):
          
          font = self.get_plugin_font()
          color_scheme = self.get_color_scheme()
          for editorstack in self.editorstacks:
              editorstack.set_default_font(font, color_scheme)
              completion_size = CONF.get('main', 'completion/size')
              for finfo in editorstack.data:
                  comp_widget = finfo.editor.completion_widget
                  comp_widget.setup_appearance(completion_size, font)
docs: Update font from Preferences