I want to customise invalid fields warning.

I want that user should close the warning instead of automatically disappearing warnings. The reason is suppose there are multiple fields that are required and user clicks on save and got invalid field warning but it disappears after 4-5 second. So user can't see the required fields properly and he have to again click on the save button and check what are those required fields.

I have tried to customise the below default method but it doesn't work for me:-

/web/static/src/js/views/basic/basic_controller.js

_notifyInvalidFields: function (invalidFields) {
    var record = this.model.get(this.handle, {raw: true});
    var fields = record.fields;
    var warnings = invalidFields.map(function (fieldName) {
        var fieldStr = fields[fieldName].string;
        return _.str.sprintf('
%s
', _.escape(fieldStr));
    });
    warnings.unshift('
');
    warnings.push('');
    this.do_warn(_t("Invalid fields:"), warnings.join(''));
},