Rewrite mediamanager JavaScript

Make it faster, prettier, less wrong, add UI effects, use jQuery UI Dialog,
Abstract tree view stuff away into jQuery.dw_tree

updated doc for tpl_indexerWebBug()

media-manager fixes

media.js fix

mediamanager without cache

deprecated prependChild()

moved the TOC toggling to dw_behaviour

mediamanager fix

jQueryized closePopups()

moved some editor functions to a new dw_editor object

There are probably more functions that should go in here

linkwiz: clear doesn't exist anymore

aliased some vars in linkwiz for brevity

fixed linkwiz position

renamed linkwiz object

more robust deprecation messages

some initial refactoring of the linkwizard

fixed delay in qsearch

The ajax quicksearch sent a request on every keystroke instead of
waiting for the user to stop typing.

another fix for the jQuery-UI theme

fixed loading of the jQuery-UI style sheet

Upgraded to jQuery 1.6.2 and jQueryUI 1.8.14

deprecated getElementsByClass

deprecated findPosX and findPosY

deprecated drag.js

mediamanager ajax forms

ajax mediamanager fix