web: Provide tests for the aggregate cards, fix a few minor things (#… #89

Job	Run time
lint (lint, web)	1m 38s
lint (lint, tests/wdio)	42s
lint (lint:lockfile, web)	1m 29s
lint (tsc, web)	1m 52s
lint (prettier-check, web)	2m 17s
lint (prettier-check, tests/wdio)	52s
lint (lit-analyse, web)	1m 48s
ci-web-mark	1s
build	1m 43s
test	2m 15s
	14m 37s

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