Fix Quick Nav Add/Remove Break Intelligent Search

Fix quick nav add/remove breaking intelligent search after clicked.

- Add `this` to jQuery element data to access methods
- Call `$.liveUpdate.setupCache()` after replacing intelligent search
  results.

Needed to modify jquery.liveupdate.js as I could not find another means
of modifying internal data.
Merge pull request #962 from mkly/bugfix_quicknav_intelligent_search

Fix Quick Nav Add/Remove Break Intelligent Search