force data menu layer_items to update when changing linewidth or cmap

jdaviz/core/template_mixin.py

@@ -4484,6 +4484,7 @@ def _on_glue_value_changed(self, value):
             # currently in subscribed states will be ignored.
             for viewer in self.subscribed_viewers:
                 viewer._update_layer_icons()
+                viewer.data_menu.layer._update_layer_items()
             # callbacks from the viewer state also do not trigger an update to the
             # layer items (tabs), so we'll force those to update from here as well.
             self.plugin.layer._update_layer_items()