lokdialog: Don't output anything for the incoming SfxRequest.

Change-Id: I1b216b7348a46835df3c2d307ce17bca64199997
Reviewed-on: https://gerrit.libreoffice.org/47985Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan Holesovsky <kendy@collabora.com>

sc/source/ui/view/tabvwsha.cxx

@@ -542,6 +542,8 @@ void ScTabViewShell::ExecuteCellFormatDlg(SfxRequest& rReq, const OString &rName
         pDlg->SetCurPageId(rName);
 
     std::shared_ptr<SfxRequest> pRequest(new SfxRequest(rReq));
+    rReq.Ignore(); // the 'old' request is not relevant any more
+
     pDlg->StartExecuteAsync([=](sal_Int32 nResult){
             bInFormatDialog = false;