Merge branch 'pr1312-no-unsafe-wxstring-conv'

Add a way to optionally disallow all implicit conversions between
wxString and "const char*".

See https://github.com/wxWidgets/wxWidgets/pull/1312

See #18113.

include/wx/window.h

@@ -1607,7 +1607,7 @@ protected:
                     const wxSize& size = wxDefaultSize,
                     long style = 0,
                     const wxValidator& validator = wxDefaultValidator,
-                    const wxString& name = wxPanelNameStr);
+                    const wxString& name = wxASCII_STR(wxPanelNameStr));
 
     bool CreateBase(wxWindowBase *parent,
                     wxWindowID winid,