Merge branch 'master' into ozg-6277-alfa-client-container-build

...-e2e/src/e2e/main-tests/postfach-mail/postfach-mail.cy.ts

...mail/postfach-mail.filtered-by-organisationseinheit.cy.ts

...gang-list-wiedervorlage/vorgang-list-wiedervorlagen.cy.ts

...2e/main-tests/wiedervorlage/wiedervorlage.erledigen.cy.ts

alfa-client/apps/alfa-e2e/src/fixtures/vorgang/vorgang.json

...s/alfa-e2e/src/page-objects/postfach-mail.component.po.ts

alfa-client/apps/alfa-e2e/src/support/angular.util.ts

alfa-client/apps/alfa/src/app/app.component.html

alfa-client/apps/alfa/src/app/app.component.scss

alfa-client/apps/alfa/src/styles/abstracts/_variables.scss

alfa-client/apps/alfa/src/styles/layout/_main.scss

alfa-client/apps/alfa/src/styles/main.scss

alfa-client/apps/alfa/src/styles/material/_autocomplete.scss

alfa-client/apps/alfa/src/styles/material/_dialog.scss

...lient/apps/alfa/src/styles/material/_expansion-panel.scss

alfa-client/apps/alfa/src/styles/material/_formfield.scss

alfa-client/apps/alfa/src/styles/material/_menu.scss

alfa-client/apps/alfa/src/styles/material/_tabs.scss

alfa-client/apps/alfa/src/styles/material/_tooltip.scss

alfa-client/apps/demo/src/app/app.component.html