Tado fixes (#11294)

* Fix tado overlay end state

Previously, when tado ended an overlay state itself, say because a timer
expired or a scheduled temperature change ocurred, the tado climate
component would not return to Smart Schedule mode. This change fixes
that issue

* Correct tado state after multiple rapid updates

Previosuly, making two changes to tado climate within 10 seconds, for
example setting operation mode to Tado mode, then changing the
temperature, would leave the entity showing the incorrect state for up
to a minute.

This change forces an unthrottled update after setting the climate
state, which fixes the issue

* Fix comment formatting