misc: always use ajax for blurp cells declared as ajax (#9094)

combo/data/models.py

@@ -459,6 +459,8 @@ class BlurpCell(CellBase):
         self.blurp_key = variant
 
     def render(self, context):
+        if settings.CMS_PLUGIN_BLURP_RENDERERS[self.blurp_key].get('ajax') and not context.get('synchronous'):
+            raise NothingInCacheException()
         renderer = cmsplugin_blurp.utils.resolve_renderer(self.blurp_key)
         template = renderer.render_template()
         context = renderer.render(context)