[Backport to 12.2] Unit test for copy computed style fails on Chrome v67

A JS unit test failed on the 12.2 build. Officially still a supported version. Can we and is it worth fixing it?

https://builds.onehippo.org/job/org_12.2_hippo-addon-channel-manager/147/org.onehippo.cms7$hippo-addon-channel-manager-frontend-ng/consoleFull#164793911357fba0a7-4c35-4713-880d-968ad05087a5

FAILED TESTS:
DomService
✖ should copy the computed style of descendants
HeadlessChrome 67.0.3396 (Linux 0.0.0)
Expected 'animation-delay: 0s; animation-direction: normal; animation-duration: 0s; animation-fill-mode: none; animation-iteration-count: 1; animation-name: none; animation-play-state: running; animation-timing-function: ease; background-attachment: scroll; background-blend-mode: normal; background-clip: border-box; background-color: rgba(0, 0, 0, 0); background-image: none; background-origin: padding-box; background-position: 0% 0%; background-repeat: repeat; background-size: auto; border-bottom-color: rgb(0, 0, 255); border-bottom-left-radius: 0px; border-bottom-right-radius: 0px; border-bottom-style: none; border-bottom-width: 0px; border-collapse: separate; border-image-outset: 0px; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; border-left-color: rgb(0, 0, 255); border-left-style: none; border-left-width: 0px; border-right-color: rgb(0, 0, 255); border-right-style: none; border-right-width: 0px; border-top-color: rgb(0, 0, 255) ... to equal 'animation-delay: 0s; animation-direction: normal; animation-duration: 0s; animation-fill-mode: none; animation-iteration-count: 1; animation-name: none; animation-play-state: running; animation-timing-function: ease; background-attachment: scroll; background-blend-mode: normal; background-clip: border-box; background-color: rgba(0, 0, 0, 0); background-image: none; background-origin: padding-box; background-position: 0% 0%; background-repeat: repeat; background-size: auto; border-bottom-color: rgb(0, 0, 255); border-bottom-left-radius: 0px; border-bottom-right-radius: 0px; border-bottom-style: none; border-bottom-width: 0px; border-collapse: separate; border-image-outset: 0px; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; border-left-color: rgb(0, 0, 255); border-left-style: none; border-left-width: 0px; border-right-color: rgb(0, 0, 255); border-right-style: none; border-right-width: 0px; border-top-color: rgb(0, 0, 255) ....
at expectEqualComputedStyle (webpack:///src/app/services/dom.service.spec.js:109:37 <- src/index.spec.js:244614:38)
at UserContext.it (webpack:///src/app/services/dom.service.spec.js:153:4 <- src/index.spec.js:244658:5)