Designer: Set C++ suffix and header lower case setting.

to be used for the promoted widgets dialog.
See also 00e954ca817f89958a8a8777d93d3843252dc88c in Qt 4.8.

Reviewed-by: Jarek Kobus <jaroslaw.kobus@nokia.com>
Task-number: QTCREATORBUG-163

src/plugins/designer/cpp/formclasswizardpage.h

@@ -63,6 +63,8 @@ public:
     FormClassWizardGenerationParameters generationParameters() const;
     void setGenerationParameters(const FormClassWizardGenerationParameters &gp);
 
+    static bool lowercaseHeaderFiles();
+
 public slots:
     void setClassName(const QString &suggestedClassName);
     void setPath(const QString &);