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

interface/wx/font.h

@@ -607,6 +607,14 @@ public:
     */
     //@{
 
+    /**
+       Returns a font with the same face/size as the given one but with normal
+       weight and style and not underlined nor stricken through.
+
+       @since 3.1.0
+    */
+    wxFont GetBaseFont() const;
+
     /**
         Returns the encoding of this font.