examples/target-disk-mode: Use enhanced header

examples/target-disk-mode/app/main.rb

@@ -1,3 +1,16 @@
+class LVGUI::BaseWindow
+  attr_reader :header_bar
+
+  def on_initialization_finished()
+    @header_bar.refresh_sizes()
+  end
+
+  def on_header_init()
+    @header_bar = MobileNixOS::EnhancedHeaderBar.new(@screen)
+    @header_bar.set_label("Target Disk Mode")
+  end
+end
+
 GUI::MainWindow.instance.present
 
 LVGUI.main_loop