refactor top block - fix and simplify

assets/sass/_theme/blocks/call_to_action.sass

assets/sass/_theme/blocks/pages.sass

assets/sass/_theme/design-system/typography.sass

layouts/partials/blocks/templates/agenda.html

layouts/partials/blocks/templates/call_to_action.html

layouts/partials/blocks/templates/chapter.html

layouts/partials/blocks/templates/contact.html

layouts/partials/blocks/templates/datatable.html

layouts/partials/blocks/templates/definitions.html

layouts/partials/blocks/templates/embed.html

layouts/partials/blocks/templates/features.html

layouts/partials/blocks/templates/files.html

layouts/partials/blocks/templates/gallery.html

layouts/partials/blocks/templates/image.html

layouts/partials/blocks/templates/key_figures.html

layouts/partials/blocks/templates/license.html

layouts/partials/blocks/templates/organizations.html

layouts/partials/blocks/templates/pages.html

layouts/partials/blocks/top.html