allow change in cmap_att on change in data components

jdaviz/core/template_mixin.py

@@ -2899,16 +2899,19 @@ def _on_viewer_layer_changed(self, msg=None):
                 if glue_name in ['contour_visible', 'bitmap_visible']:
                     state.add_callback('visible', self._on_glue_layer_visible_changed)
 
-                if self.sync.get('choices') is None and \
-                        (hasattr(getattr(type(state), glue_name), 'get_display_func')
-                         or glue_name == 'cmap'):
+                if (
+                    self.sync.get('choices') is None and
+                    (
+                        hasattr(getattr(type(state), glue_name), 'get_display_func') or
+                        glue_name == 'cmap'
+                    )
+                ) or glue_name == 'cmap_att':
                     # then we can access and populate the choices.  We are assuming here
                     # that each state-instance with this same name will have the same
                     # choices and that those will not change.  If we ever hookup options
                     # with changing choices, we'll need additional logic to sync to those
                     # and handle mixed state in the choices...
                     self.sync = {**self.sync, 'choices': self._get_glue_choices(state)}
-
         self.sync = {**self.sync,
                      'in_subscribed_states': in_subscribed_states,
                      'icons': icons,