harbour, linux: Set window icon

packages/harbour/linux/my_application.cc

@@ -51,6 +51,13 @@ static void my_application_activate(GApplication* application) {
   gtk_widget_show(GTK_WIDGET(window));
 
   g_autoptr(FlDartProject) project = fl_dart_project_new();
+
+  g_autoptr(GError) error = nullptr;
+  gtk_window_set_icon_from_file(window, g_strconcat(fl_dart_project_get_assets_path(project), "/assets/logo_harbour.svg", NULL), &error);
+  if (error != nullptr) {
+     g_warning("Failed to set icon: %s", error->message);
+  }
+
   fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);
 
   FlView* view = fl_view_new(project);