Bug fix for the slide pushing toolbar case in multi-user in firefox

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

...ui/components/whiteboard/whiteboard-toolbar/component.jsx

...s/ui/components/whiteboard/whiteboard-toolbar/styles.scss

...eboard/whiteboard-toolbar/toolbar-menu-item/component.jsx

...ard/whiteboard-toolbar/toolbar-submenu-item/component.jsx

...iteboard/whiteboard-toolbar/toolbar-submenu/component.jsx