In ac1e187ee some unecessary code and RPC were removed by ignoring
attachments in the sidebar when they would never be shown.
But there was an regression since `updateEnv` function would not
longer call redraw (which is also called in _super function).
report: https://github.com/odoo/odoo/commit/ac1e187eea3#r30569171
related to opw-1865736
closes #27146