Merge pull request #11173 from Tainan404/develop+pr10919+pr10838

bigbluebutton-html5/client/main.jsx

.../api/group-chat-msg/server/modifiers/clearGroupChatMsg.js

...ton-html5/imports/api/group-chat-msg/server/publishers.js

...tton-html5/imports/ui/components/chat/alert/container.jsx

...l5/imports/ui/components/chat/chat-dropdown/component.jsx

...tml5/imports/ui/components/chat/chat-logger/ChatLogger.js

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

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

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

...ml5/imports/ui/components/chat/message-form/container.jsx

...html5/imports/ui/components/chat/message-form/styles.scss

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

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

...imports/ui/components/chat/time-window-list/component.jsx

...imports/ui/components/chat/time-window-list/container.jsx

...5/imports/ui/components/chat/time-window-list/styles.scss

...chat/time-window-list/time-window-chat-item/component.jsx

...chat/time-window-list/time-window-chat-item/container.jsx

...ist/time-window-chat-item/message-chat-item/component.jsx

...s/chat/time-window-list/time-window-chat-item/styles.scss