Issue #86: COMMENT code

src/app/components/About.js

src/app/components/Cards.js

src/app/components/Content.js

src/app/components/DownloadButton.js

src/app/components/FiltersModal.js

src/app/components/GroupButtonsFilters.js

src/app/components/GroupCardsCollections.js

src/app/components/GroupCardsLearningObjects.js

src/app/components/Header.js

src/app/components/InfiniteScroll.js

src/app/components/InfiniteScrollCards.js

src/app/components/Loading.js

src/app/components/MenuProfile.js

src/app/components/Overlay.js

src/app/components/SearchComponent.js

src/app/components/ShareModal.js

src/app/components/SideBar.js

src/app/components/Title.js

src/app/entrar/components/SignupModal.js

src/app/recurso/[id]/components/metrics.js