Thread:Project:Support desk/Looking for File:Redirect arrow.svg control

I have a wiki where the MediaWiki:Common.css is based in Gadget-Blackskin.css. With the background constantly black there are many icons that need color adjustments to display properly. One half of my problem is the icon which of course has a transparent background and black image and font. So as many other icons I've colored adapted the file to work. The other half is I can not find where to make the file name change, I've looked at system messages, MW:Common.css and templates and I guess the only thing left is a directory or file in the mediawiki installation. So I'm hoping someone can point me to the location where this can be changed.
 * MediaWiki =  1.18.2
 * PHP 	   =  5.2.17 (cgi-fcgi)
 * MySQL     =  5.5.23-55

Thank you.