* add functions to apply changes to selected objects
* allow to highlight models by their model strings
* Utility function to show which parts come from DB
* model strings can be obtained sorted/unsorted
* will allow to highlight entities
* nested custom menus
* moved displayAutomatically() menus in view base class
* fixed which menus are displayed for aircraft models
* also changed to QStandardItem model to see if this is causing any trouble (the real bigger changes will follow in #530)
* 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)
* for new value objects (e.g. distributor, ...)
* new modes are required (e.g. CStatusMessageListModel::Simplified)
* model filter allowing to filter models
* CAircraftMappings -> will be replace by CAircraftModel
* CAircraftIcaoData aircraft ICAO data -> aircraft/airline ICAO code and livery
* CAircraft class no longer to be used, but CSimulatedAircraft
* removed corresponding GUI model classes / filters
* improved formatting of aircraft views
* extended settings for render restrictions (such as max. aircraft, max range ...)
* connected new signal / slots in runtime
* Doxygen / formatting
refs #404, and discussion https://dev.vatsim-germany.org/issues/404#note-8
* Changed CSimulatorSetup to use CNameVariantPairList as data. The old version was an hack and had to go, CNameVariantPairList would allow complex types in the future and can be already shown in the GUI.
* CNameVariantPairList was improved slightly in the same step
* Functions to get CSimulatorSetup from driver / context
* Removed CSimulatorSetup data from CSimulatorPluginInfo
* changed aircraft view to siumlated aircraft models / views
* functionality to change fast pos. updates (signals, slots)
* allow to request text message widget from aircraft component
* preparation for a context menu to send text messages from ATC/aircraft view
* preparation for context menu for fast pos. updates
* reverse ICAO lookup at login screen
* display fast updates / parts in GUI
* moved max- aircraft into settings
* made serverselection own component
