Fixes resizing bar appearing while there are no webcams shared #8531

...luebutton-html5/imports/ui/components/media/component.jsx

...luebutton-html5/imports/ui/components/media/container.jsx

bigbluebutton-html5/imports/ui/components/media/styles.scss

.../ui/components/media/webcam-draggable-overlay/context.jsx

bigbluebutton-html5/private/config/settings.yml