Order datasets by dataset family rather than project => DONE, Tests => DONE

...-multiple/components/datasets/dataset-list.component.html

...ltiple/components/datasets/dataset-list.component.spec.ts

...ch-multiple/components/datasets/dataset-list.component.ts

...iple/components/datasets/datasets-by-family.component.css

...ple/components/datasets/datasets-by-family.component.html

.../components/datasets/datasets-by-family.component.spec.ts

...tiple/components/datasets/datasets-by-family.component.ts

src/app/search-multiple/components/index.ts

...multiple/components/result/datasets-result.component.html

...tiple/components/result/datasets-result.component.spec.ts

...h-multiple/components/result/datasets-result.component.ts

...search-multiple/components/result/overview.component.html

...rch-multiple/components/result/overview.component.spec.ts

...p/search-multiple/components/result/overview.component.ts

...earch-multiple/components/summary-multiple.component.html

...ch-multiple/components/summary-multiple.component.spec.ts

.../search-multiple/components/summary-multiple.component.ts

src/app/search-multiple/containers/datasets.component.html

...app/search-multiple/containers/datasets.component.spec.ts

src/app/search-multiple/containers/datasets.component.ts