Option to transform link paths to lower case

I have a view that has a taxonomy term name as the argument, with spaces converted to dashes and text transformed to lower case. I want to link to this view from a field in another view, but at the moment I can't transform the link path to lower case. This doesn't stop the link from working, but I don't like the way it looks.

Here is a patch that allows you to apply transformations on the path. It borrows code from views_handler_argument_string.inc which I would prefer not to reuse, but not sure on the best approach in Views.