UI bugfix

src/guiengine/widget.hpp

@@ -326,7 +326,7 @@ namespace GUIEngine
          * it visible implicitely calls setActive(true). If you mix visiblity and (de)activated calls,
          * undefined behavior may ensue (like invisible but clickable buttons).
          */
-        void setVisible(bool visible);
+        virtual void setVisible(bool visible);
 
         /** Returns if the element is visible. */
         bool isVisible() const;

src/guiengine/widgets/icon_button_widget.cpp

@@ -416,3 +416,13 @@ void IconButtonWidget::setLabelFont()
         }
     }
 }
+
+// -----------------------------------------------------------------------------
+
+void IconButtonWidget::setVisible(bool visible)
+{
+    Widget::setVisible(visible);
+
+    if (m_label != NULL)
+        m_label->setVisible(visible);
+}

src/guiengine/widgets/icon_button_widget.hpp

@@ -33,6 +33,7 @@ namespace irr
 
 #include "guiengine/widget.hpp"
 #include "utils/leak_check.hpp"
+#include "utils/cpp2011.hpp"
 
 namespace GUIEngine
 {
@@ -161,6 +162,8 @@ namespace GUIEngine
         // --------------------------------------------------------------------
         /** Returns the texture of this button. */
         const video::ITexture* getTexture();
+        // --------------------------------------------------------------------
+        virtual void setVisible(bool visible) OVERRIDE;
     };
 }