if (fe_hack_self_inserting_accelerator (widget, closure, call_data)) return;
fe_back_cb (Widget widget, XtPointer closure, XtPointer call_data){  MWContext *context = (MWContext *) closure;  MWContext *top_context = XP_GetNonGridContext(context);  URL_Struct *url;  if (fe_IsGridParent(top_context))    {        if (LO_BackInGrid(top_context))          {            return;          }    }  fe_UserActivity (top_context);  if (fe_hack_self_inserting_accelerator (widget, closure, call_data))    return;  url = SHIST_CreateURLStructFromHistoryEntry (top_context,					       SHIST_GetPrevious (top_context));  if (url)    {      fe_GetURL (top_context, url, FALSE);    }  else    {      FE_Alert (top_context, fe_globalData.no_previous_url_message);    }}