refs #538, Formatting, minor tweaks, comments

* new slot syntax in ATC station component
* formatting, comments
* tab order
* utility function for severity in status message
* null checks in threadutils
* invalidKey function in datastore
* changed data object keys (cached objets)
* added missing value object compare cases
* renamed timer in context network
* finder function for model list
* renamed getContainer to container (as it is just a reference)

src/blackcore/contextownaircraftimpl.h

@@ -70,7 +70,6 @@ namespace BlackCore
         virtual bool updateOwnParts(const BlackMisc::Aviation::CAircraftParts &parts) override;
 
     public slots:
-
         //! \copydoc IContextOwnAircraft::getOwnAircraft()
         //! \ingroup ownaircraftprovider
         virtual BlackMisc::Simulation::CSimulatedAircraft getOwnAircraft() const override;