Update ExtJS to latest 3.4.* release

This works pretty without any change.
There is now better IE support.
Fixes scrolling issue in Chrome / Chromium / Webkit
Merge pull request #430 from cookiekiller/extjs_update

Updates ExtJS to latest 3.4.* release
Move css fix from JS to CSS file
Merge pull request #431 from cookiekiller/scrolling_fix_chrome

Fixes scrolling issue in Chrome / Chromium / Webkit
Merge pull request #433 from nsendetzky/master

Adds mtime as version paramter also for minified JS packages
ExtJS 3.2 to 3.4 Update
Remove unused parts of ExtJS
Merge pull request #434 from cookiekiller/update

Updates ExtJS library to latest 3.4 version
Update minified JS files

In a previous PR, some files are not minified and the ExtJS crashes
 with some undefined vars
Merge pull request #435 from cookiekiller/master

Updates minified JS files
Implement concrete itemUi classes for lists and trees
Implement AbstractListItemUi for every itemUi opened by a listUI
Implement AbstractTreeItemUi for use by treeUi
Forward TreeUi action and scope to AbstractTreeItemUi
Clean up new Abstracts and move code
Remove some old @todo
Locale should use AbstractListItemUi as well
Locale/site and text should use new abstracts
Use new abstracts for product and service