Add overlay style to buttons, continue video after expanding it

...vascripts/components/components/extended_video_player.jsx

app/assets/javascripts/components/components/icon_button.jsx

...ssets/javascripts/components/components/media_gallery.jsx

...assets/javascripts/components/components/video_player.jsx

...ts/javascripts/components/containers/status_container.jsx

app/assets/javascripts/components/features/status/index.jsx

...scripts/components/features/ui/components/video_modal.jsx

app/assets/stylesheets/components.scss