Optimize svgs with scour.

core/img/actions/add.svg

core/img/actions/caret-dark.svg

core/img/actions/caret.svg

core/img/actions/clock.svg

core/img/actions/close.svg

core/img/actions/delete-hover.svg

core/img/actions/delete.svg

core/img/actions/download.svg

core/img/actions/history.svg

core/img/actions/info.svg

core/img/actions/lock.svg

core/img/actions/logout.svg

core/img/actions/mail.svg

core/img/actions/password.svg

core/img/actions/pause-big.svg

core/img/actions/pause.svg

core/img/actions/play-add.svg

core/img/actions/play-big.svg

core/img/actions/play-next.svg

core/img/actions/play-previous.svg