Use async dialog path for format columns.

Change-Id: I7097abd68b5921697d1d5f39f5e81ac961b61226
Reviewed-on: https://gerrit.libreoffice.org/53539Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>

sw/source/uibase/shells/textsh.cxx

@@ -531,10 +531,10 @@ void SwTextShell::ExecInsert(SfxRequest &rReq)
     case FN_FORMAT_COLUMN :
     {
         SwAbstractDialogFactory* pFact = SwAbstractDialogFactory::Create();
-        OSL_ENSURE(pFact, "Dialog creation failed!");
-        ScopedVclPtr<VclAbstractDialog> pColDlg(pFact->CreateVclAbstractDialog( GetView().GetWindow(), rSh, DLG_COLUMN));
-        OSL_ENSURE(pColDlg, "Dialog creation failed!");
-        pColDlg->Execute();
+        OSL_ENSURE(pFact && "Dialog creation failed!");
+        VclPtr<VclAbstractDialog> pColDlg(pFact->CreateVclAbstractDialog( GetView().GetWindow(), rSh, DLG_COLUMN));
+        assert(pColDlg && "Dialog creation failed!");
+        pColDlg->StartExecuteAsync([](sal_Int32 /*nResult*/){});
     }
     break;