Switch activation of all devices of a group track and its children by one midi mapping.
set initial states easily by clicking inside the mapping on the device entries
set the connection to the buttons in the plugin by setting numbers on the left row of the mapping window
midimap XActivateDevices' Buttons to a midi control in Ableton Live
At the moment the Plugin doesn't observe any changes made on tracks or devices. So after changes on the arrangement the plugin needs a refresh and mappings have to be set again.