mediamanager list view thumbnails

Make getElementsByClass() work without given tag

This fixes the hiding of the highlighting of the current section when
the mouse leaves the edit section button.

mediamanager resize

mediamanager html, css reworking

mediamanager image diff

mediamanager icons

mediamanager tabs, upload form fix

Skipping plural form in plugin installed message (commit forgotten file)

Fix some bugs and glitches in (mediamanager) tree

* Fix selector in subtree loading callback
* Remove HTML inconsistencies between AJAX and plain PHP lists
* Unify icon and CSS class switching

Fix some bugs and glitches in (mediamanager) tree

* Fix selector in subtree loading callback
* Remove HTML inconsistencies between AJAX and plain PHP lists
* Unify icon and CSS class switching in dw_tree and dw_mediamanager

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Fix If-Statement

Update french string (plugins installation)

Skipping plural form in plugin installed message

mediamanager resizable

media.js fixes

make use of auth_isMember() in XMLRPC authentication check FS#2287

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

media-manager fixes

media.js fix

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