[IMP] web: default title for confirmation dialogs

The confirmation have now "Confirmation" as default title.

addons/web/static/src/core/confirmation_dialog/confirmation_dialog.js

@@ -35,6 +35,9 @@ ConfirmationDialog.props = {
     cancel: { type: Function, optional: true },
     close: Function,
 };
+ConfirmationDialog.defaultProps = {
+    title: _lt("Confirmation"),
+};
 
 ConfirmationDialog.bodyTemplate = "web.ConfirmationDialogBody";
 ConfirmationDialog.footerTemplate = "web.ConfirmationDialogFooter";