Merge pull request #6676 from jfsiebel/unlock-individual-user

...luebutton-html5/imports/api/users/server/eventHandlers.js

bigbluebutton-html5/imports/api/users/server/methods.js

...-html5/imports/api/users/server/methods/toggleUserLock.js

...utton-html5/imports/ui/components/user-list/component.jsx

...utton-html5/imports/ui/components/user-list/container.jsx

...uebutton-html5/imports/ui/components/user-list/service.js

...s/ui/components/user-list/user-list-content/component.jsx

...er-list/user-list-content/user-participants/component.jsx

...er-list/user-list-content/user-participants/container.jsx

...st-content/user-participants/user-list-item/component.jsx

...r-participants/user-list-item/user-dropdown/component.jsx

bigbluebutton-html5/private/locales/en.json