Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/web-app-portfolio/templates/menu/header.yml.j2

@@ -0,0 +1,14 @@
+  header:
+    children:
+    - link: applications
+    - name: Toggle
+      description: Enter or exit fullscreen mode
+      icon:
+        class: fa-solid fa-expand-arrows-alt
+      onclick: "toggleFullscreen()"
+
+    - name: Tab
+      description: Open the currently embedded iframe URL in a fresh browser tab
+      icon:
+        class: fa-solid fa-up-right-from-square
+      onclick: openIframeInNewTab()