Do not fail at attaching developer tools

src/PostIt/PostIt/App.axaml.cs

@@ -33,7 +33,14 @@ public partial class App : Application
     {
         AvaloniaXamlLoader.Load(this);
 #if DEBUG
+        try {
             this.AttachDeveloperTools();
+        }
+        catch (Exception ex)
+        {
+            Console.Error.WriteLine(
+                $"Could not attache developer tools : {ex.Message}");
+        }
 #endif
     }