fixes #18239 - wait for AJAX spinners removal on about page test
`wait_for_ajax` alone may return after page load before AJAX requestshave even begun, so also wait for the spinners to be replaced.
Added by Dominic Cleal over 7 years ago
fixes #18239 - wait for AJAX spinners removal on about page test
`wait_for_ajax` alone may return after page load before AJAX requests
have even begun, so also wait for the spinners to be replaced.