Update lang-de.json

Revised spelling errors.
Change in "connection":"about-connect"
Change in "activation":"error", now similar to "connection":"failure"
Update lang-de.json

Configuration should rather be called "Einrichten" than "Konfiguration" because we also use this term later.
better error messages for network setup wizard
localize "error code" in wizard/current
add localized tooltips and sensor descriptions to hexanode
teach the endpoint registry about the function of endpoints

each endpoint has a specific function: sensor, actor, infrastructure,
and possibly things i forgot about while writing this. displaying
infrastructure endpoints, e.g. in hexanode, is not very useful, and
applications should not duplicate this registry if possible
Merge branch 'development' into pb-hexanode

Conflicts:
	hostsoftware/hexanode/webfrontend/public/lang/lang-de.json
send nearly full endpoint descriptor to the web frontend

that way, the frontend can easily track (but ignore) infrastructure
endpoints