Use wxGetTranslation() instead of _() in the public headers.

This allows the code in them to compile even when WXINTL_NO_GETTEXT_MACRO is
defined.

Closes #15443.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74812 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/richmsgdlg.h

@@ -26,8 +26,8 @@ public:
                              const wxString& caption,
                              long style )
         : wxGenericMessageDialog( parent, message, caption, style ),
-          m_detailsExpanderCollapsedLabel( _("&See details") ),
-          m_detailsExpanderExpandedLabel( _("&Hide details") ),
+          m_detailsExpanderCollapsedLabel( wxGetTranslation("&See details") ),
+          m_detailsExpanderExpandedLabel( wxGetTranslation("&Hide details") ),
           m_checkBoxValue( false )
         { }