Add active filters with possibility to remove it and reset to initial state

...osource/components/filter-list/filter-list.component.html

...osource/components/filter-list/filter-list.component.scss

...geosource/components/filter-list/filter-list.component.ts

src/app/geosource/services/dataset-research.service.ts

src/i18n/messages.en.xlf

src/i18n/messages.fr.xlf

src/scss/variables.scss