Refactor the i18n server code

bigbluebutton-html5/client/main.jsx

...l5/imports/api/captions/server/handlers/captionHistory.js

bigbluebutton-html5/imports/locales/pt-BR.json

bigbluebutton-html5/imports/startup/client/routes.js

bigbluebutton-html5/imports/startup/server/index.js

bigbluebutton-html5/imports/ui/components/app/component.jsx

bigbluebutton-html5/imports/ui/components/app/container.jsx

bigbluebutton-html5/imports/ui/components/app/service.js

...ml5/imports/ui/components/chat/message-list/component.jsx

...chat/message-list/message-list-item/message/component.jsx

...l5/imports/ui/components/dropdown/list/item/component.jsx

...ebutton-html5/imports/ui/components/nav-bar/component.jsx

...ml5/imports/ui/components/notifications-bar/container.jsx

...orts/ui/components/user-list/user-list-item/component.jsx

bigbluebutton-html5/imports/ui/services/auth/index.js

bigbluebutton-html5/imports/ui/services/storage/reactive.js

bigbluebutton-html5/private/config/public/app.yaml

bigbluebutton-html5/private/locales/bg_BG.json

bigbluebutton-html5/private/locales/de.json

bigbluebutton-html5/private/locales/en.json