* Notify service for joined game
* Notify all clients about new generated games
* Notify all clients about an updated game (other player joined)
* Remove "Ping" method from the service because it does not work like expected
* Rename Game object to GameConfiguration because it is more meaningful
* Create game controller for each started game
* On start of the client all already known games will be load
* Create waiting window until the service connection will be established
* Close MainViewModel with a concrete reason to be see from outside what to do
* The main window shows a list of available games directly
* Add new game window (no functionality yet)