Well, I decided to play with the image file and made the white "X" into a pink one. I made a backup first. I did need to edit the
eq2map_ignorelist.xml file and add this file so it wouldn't update it and undo the modification.
Code:
<?xml version="1.0" encoding="utf-8"?>
<IgnoreList>
<File Name="icon_eq2map.dds" />
</IgnoreList>
I've a attached a copy of it in a zip-file. Just be sure to backup your existing copy first.