Refactor app name retrieval and remove single instance limit

Modified AppPaths.cs to dynamically retrieve the app's display name
using AppInfo.Current.DisplayInfo.DisplayName instead of a hardcoded
string. Removed single instance enforcement in App.xaml.cs, allowing
multiple instances of the application to run simultaneously.

Signed-off-by: Christoph Hofmann <[email protected]>

Author: hoffe86

src/openHAB.Core/AppPaths.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using Windows.ApplicationModel;
 
 namespace openHAB.Core;
 
@@ -8,7 +9,7 @@ namespace openHAB.Core;
 /// </summary>
 public class AppPaths
 {
-    private const string _applicationName = "openHAB";
+    private static readonly string _applicationName = AppInfo.Current.DisplayInfo.DisplayName;
 
     /// <summary>
     /// Gets the directory path for application data.

src/openHAB.Windows/App.xaml.cs

@@ -70,11 +70,6 @@ protected override async void OnLaunched(LaunchActivatedEventArgs e)
         _logger.LogInformation("=== Start Application ===");
         _appManager.SetProgramLanguage(null);
 
-        // TODO This code defaults the app to a single instance app. If you need multi instance app, remove this part.
-        // Read: https://docs.microsoft.com/en-us/windows/apps/windows-app-sdk/migrate-to-windows-app-sdk/guides/applifecycle#single-instancing-in-applicationonlaunched
-        // If this is the first instance launched, then register it as the "main" instance.
-        // If this isn't the first instance launched, then "main" will already be registered,
-        // so retrieve it.
         AppInstance mainInstance = AppInstance.FindOrRegisterForKey("main");
         AppActivationArguments activatedEventArgs = AppInstance.GetCurrent().GetActivatedEventArgs();