[icon-theme] Don't use the theme name
[icon-theme] Don't use the theme name

Don't use the theme name from the key file as part of the path, it
doesn't correspond to the directory name - instead, use the set theme
name which does.

jonnylamb/mx,pwithnall/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx,clutter-project/mx,pwithnall/mx