[ExpansionPanel] Possibility to disable the toggle button

radio/src/thirdparty/libopenui/src/expansion_panel.h

@@ -70,6 +70,13 @@ class ExpansionPanel: public FormGroup
       updateHeight();
     }
 
+    void setCloseAllowed(bool value = true)
+    {
+      if (value) {
+        header->disable();
+      }
+    }
+
     void enable(bool value = true)
     {
       FormGroup::enable(value);

radio/src/thirdparty/libopenui/src/modal_window.h

@@ -33,7 +33,7 @@ class ModalWindow: public Window
     }
 #endif
 
-    void deleteLater(bool detach = true, bool trash = true) override;
+    void deleteLater(bool detach = true, bool trash = true) override; // NOLINT(google-default-arguments)
 
     void paint(BitmapBuffer * dc) override;