Merge branch 'interface'

apps/files_imageviewer/js/lightbox.js

apps/media/appinfo/app.php

apps/media/css/player.css

apps/media/img/media.png

apps/media/js/files.js

core/css/styles.css

core/img/actions/back.png

core/img/actions/back.svg

core/img/actions/delete.png

core/img/actions/delete.svg

core/img/actions/download.png

core/img/actions/download.svg

core/img/actions/logout.png

core/img/actions/logout.svg

core/img/actions/rename.png

core/img/actions/rename.svg

core/img/actions/settings.png

core/img/actions/settings.svg

core/img/actions/share.png

core/img/actions/share.svg