Agent 2.43.0

Added Add a new host that is allowed to launch designer to facilitate testing designer releases

Added Catch errors in customer-defined functions for sanitizeUrl and annotateUrl to prevent downstream side-effects

Fixed Fix margin calculations for large guides

Fixed Fix issue that caused designer login to be in the loading state forever

Fixed Fix issue that prevents the resource center from opening when guide center is deactivated

Fixed Guide backdrop can be enabled in classic designer

Fixed remove 100ms URL polling interval in browsers that support hashchange and the history API