Add wxFont::GetBaseFont().

This can be used to "undo" the result of Bold() ,Underlined() or Italic()
methods and returns an unadorned version of the font.

Closes #11815.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76120 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/font.h

@@ -507,6 +507,7 @@ WXDLLIMPEXP_CORE bool wxFromString(const wxString& str, wxFontBase* font);
     wxFont& Scale(float x); \
     /* functions for creating fonts based on this one */ \
     wxFont Bold() const; \
+    wxFont GetBaseFont() const; \
     wxFont Italic() const; \
     wxFont Underlined() const; \
     wxFont Strikethrough() const; \