Merge branch 'master' into 'D81919'

...onents/dataset-downloads/dataset-downloads.component.html

...ail/components/dataset-table/dataset-table.component.html

...etail/components/dataset-table/dataset-table.component.ts

src/app/dataset-detail/services/dataset-detail.service.ts

src/app/dataset-detail/services/usage-statistics.service.ts

src/app/elasticsearch/services/elasticsearch.service.ts

src/app/shared/models/data.model.ts

src/app/shared/variables.ts