colorize-svg: Colorize using a method compatible with rsvg
colorize-svg: Colorize using a method compatible with rsvg

We've been using this approach in MediaWiki for a while already.
This will allow the icons to be correctly rendered when uploaded
to Wikimedia Commons, e.g. for use in guides and documentation.

Bug: T154572
Change-Id: If223b90cfe2f0bba8b4e5f4d55984ba15d759c76

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui