Merge pull request #5993 from KDSBrowne/5980-chat-input-font-size

...mports/ui/components/chat/alert/audio-alert/component.jsx

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

...imports/ui/components/chat/alert/push-alert/component.jsx

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

...ui/components/settings/submenus/application/component.jsx

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

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

bigbluebutton-html5/private/config/settings-development.json

bigbluebutton-html5/private/config/settings-production.json