more work on gtk & code cleanup

Pilz.IO/EmbeddedFilesContainer.cs

@@ -6,7 +6,7 @@ namespace Pilz.IO;
 public class EmbeddedFilesContainer
 {
     [JsonProperty("CompressedFiles")]
-    private readonly Dictionary<string, byte[]> compressedFiles = new Dictionary<string, byte[]>();
+    private readonly Dictionary<string, byte[]> compressedFiles = [];
 
     /// <summary>
     /// Returns the names of all embedded files.

Pilz.IO/ManagedPipes/ManagedPipeServer.cs

@@ -7,7 +7,7 @@ public class ManagedPipeServer : ManagedPipe
 {
 
     // Pro Verbindung (Anfrage) wird ein Client-Objekt generiert, das den Datenaustausch dieser Verbindung abwickelt
-    public List<ManagedPipeClient> Clients { get; private set; } = new List<ManagedPipeClient>();
+    public List<ManagedPipeClient> Clients { get; private set; } = [];
 
     private readonly string pipeName = "";
     private readonly int maxNumbersOfServerInstances;