Merge branch 'omalkja/url_shortener' into 'develop'

src/App.vue

src/i18n/de/index.js

src/i18n/en/index.js

src/services/bookmark.js

src/store/config/actions.js

src/store/contents/actions.js

tests/cypress/e2e/annotation.cy.js

tests/cypress/e2e/bookmark.cy.js

tests/cypress/e2e/config.cy.js

tests/cypress/e2e/content.cy.js

tests/cypress/e2e/header.cy.js

tests/cypress/e2e/metadata.cy.js

tests/cypress/e2e/tree.cy.js