Change the Echo MediaWiki extension to use https://www.mediawiki.org/wiki/File:Gear_icon.svg instead of the current gear icons (there are two).

It must use the SVG in supported browsers, but still render (using PNG) in older browsers (currently it only uses PNG). You may wish to use background-image-svg for this.  You should copy the SVG into the extension.  You will probably need to crop it.

This will require you to convert to PNG (of the appropriate size).

Please read https://bugzilla.wikimedia.org/show_bug.cgi?id=50843 before starting.

Students are required to read Wikimedia's general instructions first.