Merge branch 'rc-v1.4.0' into 'master'

CHANGELOG.md

assets/css/event-grid.css

assets/js/accordion.js

assets/js/countdown.js

assets/js/featured-banner.js

assets/scss/event-grid.scss

cern_display_formats.info.yml

cern_display_formats.libraries.yml

cern_display_formats.links.menu.yml

cern_display_formats.module

cern_display_formats.routing.yml

src/Form/DisplayFormatsSettingsForm.php

src/Plugin/views/style/Accordion.php

src/Plugin/views/style/CardGrid.php

src/Plugin/views/style/Collision.php

src/Plugin/views/style/Countdown.php

src/Plugin/views/style/EventGrid.php

src/Plugin/views/style/FeaturedBanner.php

src/Plugin/views/style/HorizontalBoxes.php

src/Plugin/views/style/TeaserList.php