Merge pull request #5351 from oswaldoacauan/dropdown-styling

...utton-html5/imports/ui/components/actions-bar/styles.scss

...button-html5/imports/ui/components/dropdown/component.jsx

...tml5/imports/ui/components/dropdown/content/component.jsx

...n-html5/imports/ui/components/dropdown/list/component.jsx

...ton-html5/imports/ui/components/dropdown/list/styles.scss

...uebutton-html5/imports/ui/components/dropdown/styles.scss

...tml5/imports/ui/components/dropdown/trigger/component.jsx

...ports/ui/components/video-provider/video-menu/styles.scss