Fix broken keyboard navigation in the new file/project dialog

* Enabled proper keyboard navigation
* Skip header items when using arrow keys
* Fixed a static pixmap warning

Task-number: QTCREATORBUG-1237

Reviewed-by: Daniel Molkentin

src/plugins/coreplugin/dialogs/newdialog.h

@@ -70,7 +70,6 @@ private slots:
     void currentItemChanged(const QModelIndex &);
     void okButtonClicked();
     void updateOkButton();
-
 private:
     Core::IWizard *currentWizard() const;