Keep systemd-manager's menu shown after toggling a service

[benintech]

After toggling a service, the menu is hidden.
Sometimes I have to toggle several services in a row, that makes me click again on the extension to show the menu again, before toggling the next service.
I think systemd-manager's menu should remain on screen after toggling a service (until the user closes explicitly the menu by hitting or clicking somewhere else on the screen).
And even when toggling a single service, IMO the menu should remain. I think it's reassuring to see the toggling applied (but maybe that's just me)