switching from one sort order to relevance sorting can fail

[Galen Charlton]

Consider the following steps:

- do a public catalog search starting from the advanced search form, e.g., keyword = "cats"
- change the sort order to (say) Title A-Z from the results page.
- note that the query string changes to "sort(titlesort) cats" and that the results are re-sorted
- attempt to change the sort order to relevance.
- this time, the sort order does not change ... and it should have.

Evergreen master.

[Galen Charlton (gmc)]

Two patches are available at the tip of the user/gmcharlt/lp1562153_sorting_must_remain_relevant branch in the working/Evergreen repository:

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/gmcharlt/lp1562153_sorting_must_remain_relevant

[Mike Rylander (mrylander)]

Yay for better param management!

Picked into 2.8-master with thanks, Galen!