Merge SCSS in a single `components.scss` file #951

Job	Run time
build (production)	3m 27s
build (test)	3m 36s
End to End testing (3.0)	4m 51s
End to End testing (3.1)	5m 3s
test (3.0)	8m 4s
Elastic Search integration testing (3.0, docker.elastic.co/elasticsearch/elasticsearch:7.17.13)	2m 35s
End to End testing (.ruby-version)	4m 47s
Elastic Search integration testing (3.1, docker.elastic.co/elasticsearch/elasticsearch:7.17.13)	2m 22s
Elastic Search integration testing (.ruby-version, docker.elastic.co/elasticsearch/elasticsearch:...	2m 32s
test (3.1)	7m 35s
test (.ruby-version)	9m 13s
Elastic Search integration testing (.ruby-version, docker.elastic.co/elasticsearch/elasticsearch:...	2m 41s
	56m 46s

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