message: Add shortcuts to Find window buttons
  Fixes
diff: @@ -143,8 +143,8 @@ FindFrame::FindFrame(PoeditFrame *owner,
  #endif
  m_btnClose = new wxButton(panel, wxID_CLOSE, _("Close"));
  - m_btnReplaceAll = new wxButton(panel, wxID_ANY, MSW_OR_OTHER(_("Replace all"), _("Replace All")));
  - m_btnReplace = new wxButton(panel, wxID_ANY, _("Replace"));
  + m_btnReplaceAll = new wxButton(panel, wxID_ANY, MSW_OR_OTHER(_("Replace &all"), _("Replace &All")));
  + m_btnReplace = new wxButton(panel, wxID_ANY, _("&Replace"));
  m_btnPrev = new wxButton(panel, wxID_ANY, _("< &Previous"));
  m_btnNext = new wxButton(panel, wxID_ANY, _("&Next >"));
  m_btnNext->SetDefault();
  