Introudce a Display::stop method
This will allow us to stop clients before termination, to get a better order.
Calling wl_display_destroy_clients a second time in the destructor no-ops if this is done already.
This will allow us to stop clients before termination, to get a better order.
Calling wl_display_destroy_clients a second time in the destructor no-ops if this is done already.