[FR]: take MQTT 'optimistic' mode into account

[svanderh]

Is your feature request related to a problem? Please describe.

if a switch (MQTT) is defined in the configuration with the optimistic flag true, then it will assume the state after the switch. This is usefull if the state is not updated (mqtt return message) immediately. (explained in https://www.home-assistant.io/integrations/switch.mqtt/)
this works with a normal button definistion, but not in the Paper button row

Describe the solution you'd like

1: Take the optimistic flag into account

Describe alternatives you've considered

2: i have looked after another option (eg change the state for 'x' seconds to the assumed state for x seconds, because the final state will be confirmed in a few seconds

Additional context

No response