added "go back" functionality for distractionlist screen

InnoLabProjektDektopApp/.vs/InnoLabProjektDektopApp/v17/.suo

...ktDektopApp/Screens/FirstLaunch/03_1DistractionsList.xaml

...ektopApp/Screens/FirstLaunch/03_1DistractionsList.xaml.cs

...ug/net8.0-windows/InnoLabProjektDektopApp.AssemblyInfo.cs

...-windows/InnoLabProjektDektopApp.AssemblyInfoInputs.cache

...g/net8.0-windows/Screens/FirstLaunch/01Startscreen.g.i.cs

...ebug/net8.0-windows/Screens/FirstLaunch/02Progress.g.i.cs

...et8.0-windows/Screens/FirstLaunch/03_0Distractions.g.i.cs

...0-windows/Screens/FirstLaunch/03_1DistractionsList.g.i.cs

.../Debug/net8.0-windows/Screens/FirstLaunch/04Settings.g.cs

...ebug/net8.0-windows/Screens/FirstLaunch/04Settings.g.i.cs

...oLabProjektDektopApp/obj/Debug/net8.0-windows/apphost.exe