Improve support for ribbon panel sizers: panels with sizers should now automatically minimise at small sizes, and behave properly when popping up from a minimised state.

Patch by johnr in trac issue #12580.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65852 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/ribbon/panel.h

@@ -76,6 +76,8 @@ public:
 
 protected:
     virtual wxSize DoGetBestSize() const;
+    virtual wxSize GetPanelSizerBestSize() const;
+    wxSize  GetPanelSizerMinSize() const;
     wxBorder GetDefaultBorder() const { return wxBORDER_NONE; }
     wxSize GetMinNotMinimisedSize() const;