Responsive for mobile + i18n for dataset detail information

...e/components/dataset-detail/dataset-detail.component.html

...e/components/dataset-detail/dataset-detail.component.scss

...fo/dataset-description/dataset-description.component.html

...fo/dataset-description/dataset-description.component.scss

...info/dataset-description/dataset-description.component.ts

...s/dataset-detail/dataset-info/dataset-info.component.html

...s/dataset-detail/dataset-info/dataset-info.component.scss

...nts/dataset-detail/dataset-info/dataset-info.component.ts

webapp/src/app/geosource/models/metadata.model.ts

webapp/src/app/geosource/services/dataset.service.ts

webapp/src/scss/variables.scss