The Shutter and Shutter + Tilt plugins handle UpOrOpen, DownOrClose,
StopMotion and GoToLiftPercentage (and GoToTiltPercentage for tilt) in
invoke_request(), but AcceptedCommandList (0xFFF9) of the Window
Covering cluster was empty. Controllers that build their feature set
from this list, such as Home Assistant, then don't offer setting the
position or tilt.
Override get_accepted_commands() in both plugins to report the
commands they implement.
Fixes #25146
The MQTT flags m1, m2, m3 and mh were stored one slot too high
(position[i-6]), so mh set the triple press flag and m1 wrote before
the start of the position array. mi (mqtt_all) could not be set at all.
Store m1..mh in position[0..3], set mqtt_all from mi and include it in
the command response, as the ESP8266 driver already does.
Fixes #25082
Zhaoqi Xu