MQTT: WIP, re-organized disconnection handling, now keep track of connection status and reconnect accordingly.
This fixes bug with non-reconnecting to broker when having no published variables.
<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot xmlns:xsd="http://www.w3.org/2001/XMLSchema" URI_location="PYRO://127.0.0.1:61427">
<TargetType/>
<Libraries Enable_SVGHMI_Library="true"/>
</BeremizRoot>