We should update the port input to be an html `number` field. In connection model we can remove the port validation: https://github.com/mongodb-js/connection-model/blob/master/lib/data-types.js#L18 this error is not properly caught and is one of our larger bugsnag reports: [https://app.bugsnag.com/mongodb/mongodb-compass/errors/5975fdd000f9a600199afc7a?filters[event.since][0]=30d&filters[error.status][0]=open] 
We should just let an invalid port be passed to the driver, and validated there.