refs #786, prepare contexts for matching messages

In same step cleaned up contexts a bit
* added function for model set strings
* renamed functions to getModelSet... instead of installed models (the set is smaller and is what we want to use with DBus)
* signal when debug/log flags changed
* removed some \copydoc
* allow to enable/disable rev.lookup/matching messages
* removed reload model function (dangling)

src/blackcore/context/contextnetworkproxy.cpp

@@ -88,6 +88,7 @@ namespace BlackCore
                                    "removedAircraft", this, SIGNAL(removedAircraft(BlackMisc::Aviation::CCallsign)));
             Q_ASSERT(s);
             Q_UNUSED(s);
+            this->relayBaseClassSignals(serviceName, connection, IContextNetwork::ObjectPath(), IContextNetwork::InterfaceName());
         }
 
         void CContextNetworkProxy::readAtcBookingsFromSource() const