Cosmetic Fixes and Correct Security Issue

- Fix security issue where captcha could be consistently bypassed by
sending server modified hash and salt
- Fix warning that did not disappear on registration page
- Minor cosmetic changes
Add Current Tab Highlighting
Reorganize Sorted Table Assets

This also fixes an earlier bug which had resulted in multiple 404s
Optimize Tab Highlighting on Results Pages

Deleted purl.js since it would no longer be necessary