1.28.1 is no longer published to the MATE mirror and is only available
on GitHub. The build system switched from autotools to Meson in this
release. Remove autoreconf, yelp-tools, gtk-doc, and autoconf-archive
build deps, no longer needed. Remove gnomeprefix from USE_GNOME as it
sets CONFIGURE_ARGS which is incompatible with Meson. Update OPTIONS
to use MESON_ENABLE. Update pkg-plist: add scalable action SVG icons
and thumbnailer, remove three help locales not installed by Meson.
Eric Turgeon
016db66340