edited class NetworkDialog
to change the logic that the checkbox works now as intended
moved BattleshipServer and ReceivedMessage into own folders to separate server from client
added class BattleshipServer, ReceivedMessage
to implement the feature that a client is able to start an server
edited NetworkDialog to implement the logic to start an server and overhauled the GUI to be appropriate for the new features
added class BackgroundMusic
edited BattleshipApp, GameSound, Menu
implemented a Slider for the Gui in order to change the Volume
Quality of Life
implemented feature to Safe the Sound settings to keep them even after shutting down the game
implemented feature to mute Sounds/effects
implemented feature to mute Music