Merge pull request #10195 from KDSBrowne/dev2.3-fix-poll-chat-grouping

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

...ponents/chat/message-list/message-list-item/container.jsx

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

...omponents/chat/message-list/message-list-item/styles.scss

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

...tml5/imports/ui/components/poll/live-result/component.jsx

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