Correctly preserve the have_search value.
Revert "Bug: 13308 Fix returning to previously selected tab after task is saved."

This reverts commit 6343acc8221a9ba5f26ca55d302c1cc074b072e2.
Proper fix for Bug: 13308
Fix using 'Return to Search' links for both SmartLists and normal searches.

Related to Bug: 13308