Add the reset link when there are search keys

I used this patch for a bit, but after customizing my search key and combining it with current_search_links module (to display reset buttons beside each facet), this module would no longer clear out keywords.

I've updated the patch to add in a custom settings field for the search keyword (mimicking the current_search_links module) so that the keywords could be properly removed. It meant I had to duplicate the CurrentSearchItem settings form, but I couldn't see a way around this.

Hope this helps someone else!

Hmm, my patch still doesn't work 100% with current_search_links module.

Okay, fixed an issue with the filter intersection list. If the first entry was empty (as is the case if removing the parent term in a hierarchy-enforced list), it was accidentally including the second filter in the reset link query.

Patch re-roll to reflect newer module version.