[FIX] ContextHandler: Merge local context into globals before serialization

Orange/widgets/settings.py

@@ -650,20 +650,21 @@ def pack_data(self, widget):
         return data
 
     def update_defaults(self, widget):
-        """Call the inherited method, then merge the local context into the
-        global contexts. This make sense only when the widget does not use
-        global context (i.e. `widget.context_settings is not
-        self.global_contexts`); this happens when the widget was initialized by
-        an instance-specific data that was passed to :obj:`initialize`."""
+        """
+        Reimplemented from SettingsHandler
+
+        Merge the widgets local contexts into the global contexts and persist
+        the settings (including the contexts) to disk.
+        """
         self.settings_from_widget(widget)
+        globs = self.global_contexts
+        assert widget.context_settings is not globs
+        ids = {id(c) for c in globs}
+        globs += (c for c in widget.context_settings if id(c) not in ids)
+        globs.sort(key=lambda c: -c.time)
+        del globs[self.MAX_SAVED_CONTEXTS:]
 
         super().update_defaults(widget)
-        globs = self.global_contexts
-        if widget.context_settings is not globs:
-            ids = {id(c) for c in globs}
-            globs += (c for c in widget.context_settings if id(c) not in ids)
-            globs.sort(key=lambda c: -c.time)
-            del globs[self.MAX_SAVED_CONTEXTS:]
 
     def new_context(self, *args):
         """Create a new context."""