Fix missing CSS for CW margins #1679

Job	Run time
build (production)	4m 3s
build (test)	4m 23s
Libvips tests (3.1)	2m 12s
Libvips tests (3.2)	1m 35s
End to End testing (3.1)	2m 45s
Elastic Search integration testing (3.1, docker.elastic.co/elasticsearch/elasticsearch:7.17.13)	2m 52s
Libvips tests (.ruby-version)	2m 36s
test (3.1)	5m 7s
End to End testing (3.2)	2m 21s
Elastic Search integration testing (3.2, docker.elastic.co/elasticsearch/elasticsearch:7.17.13)	2m 58s
test (3.2)	5m 20s
End to End testing (.ruby-version)	3m 4s
Elastic Search integration testing (.ruby-version, docker.elastic.co/elasticsearch/elasticsearch:...	3m 55s
test (.ruby-version)	6m 19s
Elastic Search integration testing (.ruby-version, docker.elastic.co/elasticsearch/elasticsearch:...	3m 43s
Elastic Search integration testing (.ruby-version, opensearchproject/opensearch:2)	3m 49s
	57m 2s

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