`update_list` is an expensive operation and could be avoided when no modules are
updated. Particually, it speeds up initial theme installation on website, which
has following code:
```
themes.filtered(lambda m: m.state == 'installed').button_upgrade()
```
Benchmark for Odoo 15: `/website/configurator_apply` spends 1.3 sec for unneeded
`update_list` call.
closes odoo/odoo#75140
X-original-commit: 82ba4994e54fc46cc55a463629727e840349bb6e
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>
Signed-off-by: Ivan Yelizariev // IEL <yelizariev@users.noreply.github.com>