sliders now correctly control original floor volume per-channel

...ton-html5/imports/ui/components/actions-bar/component.jsx

...on-html5/imports/ui/components/translations/component.jsx

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

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

...list/user-list-content/translation-settings/component.jsx

...r-list/user-list-content/translation-settings/styles.scss

...uebutton-html5/imports/ui/services/audio-manager/index.js

bigbluebutton-html5/public/locales/de.json

bigbluebutton-html5/public/locales/en.json