Support for an external switch on devices from SimpleHW

We have added support for data from external switches A and B that can be sent by SimplePack 3 and newer, SimpleIndustry / SimpleMeter if supported by a specific device model.
You can add data from switch A and switch B via downlink on Heartbeat 1, Heartbeat 2, and all messages that supports appended data.
Data from external switch (ON/OFF) then will be available on the main dashboard and in charts.