symbolic 'hicolor' fallback icons for X11 applications

Icons are installed under $PREFIX/share/hicolor/scalable/actions

If an application uses an symbolic icon that is not included in the
configured icon theme, it will fall back to the 'hicolor' theme.

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: https://github.com/xapp-project/xapp-symbolic-icons
