[zun][zun-ui][horizon] Request code review for a breaking fix

Hi Horizon folks, We have an issue that needs to be fixed at horizon side. Please check this bug: https://bugs.launchpad.net/zun-ui/+bug/1847889 We propose a fix on Horizon but the patch hasn't been moved forward for a while. Would I ask for a code review for the patch https://review.opendev.org/#/c/688290/ ? Without the fix, our horizon plugin couldn't work correctly. Best regards, Hongbin