build(webpack): Only show errors in webpack output (#12425)
build(webpack): Only show errors in webpack output (#12425)

Also adds an overlay to show webpack errors in browser.
mvaled/sentry,beeftornado/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,mvaled/sentry