WIP: Init by url

...h-multiple/components/progress-bar-multiple.component.css

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

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

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

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

src/app/search-multiple/search-multiple-routing.module.ts

...ultiple/store/model/search-multiple-query-params.model.ts

src/app/search-multiple/store/search-multiple.action.ts

src/app/search-multiple/store/search-multiple.effects.ts

src/app/search-multiple/store/search-multiple.reducer.ts

src/app/search-multiple/store/search-multiple.selector.ts