Fix typos and missing items in the ribbon interface definitions

interface/wx/ribbon/panel.h

@@ -5,6 +5,18 @@
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
+
+enum wxRibbonPanelOption
+{
+    wxRIBBON_PANEL_NO_AUTO_MINIMISE,
+    wxRIBBON_PANEL_EXT_BUTTON,
+    wxRIBBON_PANEL_MINIMISE_BUTTON,
+    wxRIBBON_PANEL_STRETCH,
+    wxRIBBON_PANEL_FLEXIBLE,
+    wxRIBBON_PANEL_DEFAULT_STYLE
+};
+
+
 /**
     @class wxRibbonPanelEvent