Closed captions cleanup

bigbluebutton-html5/imports/api/captions/server/helpers.js

...ml5/imports/api/captions/server/methods/createCaptions.js

...html5/imports/api/captions/server/methods/editCaptions.js

...imports/api/captions/server/methods/fetchReadOnlyPadId.js

...tml5/imports/api/captions/server/methods/takeOwnership.js

...html5/imports/api/captions/server/modifiers/addCaption.js

...orts/api/captions/server/modifiers/updateReadOnlyPadId.js

.../ui/components/actions-bar/actions-dropdown/component.jsx

.../imports/ui/components/actions-bar/captions/component.jsx

.../imports/ui/components/actions-bar/captions/container.jsx

...components/actions-bar/captions/reader-menu/component.jsx

...button-html5/imports/ui/components/captions/component.jsx

...on-html5/imports/ui/components/captions/pad/container.jsx

...luebutton-html5/imports/ui/components/captions/service.js

.../imports/ui/components/captions/writer-menu/component.jsx

...luebutton-html5/imports/ui/components/settings/service.js

...s/user-list/user-list-content/user-captions/component.jsx

...s/user-list/user-list-content/user-captions/container.jsx

bigbluebutton-html5/private/config/settings.yml

bigbluebutton-html5/private/locales/en.json