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diff --git a/frontend/beta/css/yui/tree.css b/frontend/beta/css/yui/tree.css
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+++ b/frontend/beta/css/yui/tree.css
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+/*
+
+Copyright 2008-2011 Clipperz Srl
+
+This file is part of Clipperz's Javascript Crypto Library.
+Javascript Crypto Library provides web developers with an extensive
+and efficient set of cryptographic functions. The library aims to
+obtain maximum execution speed while preserving modularity and
+reusability.
+For further information about its features and functionalities please
+refer to http://www.clipperz.com
+
+* Javascript Crypto Library is free software: you can redistribute
+  it and/or modify it under the terms of the GNU Affero General Public
+  License as published by the Free Software Foundation, either version
+  3 of the License, or (at your option) any later version.
+
+* Javascript Crypto Library is distributed in the hope that it will
+  be useful, but WITHOUT ANY WARRANTY; without even the implied
+  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Affero General Public License for more details.
+
+* You should have received a copy of the GNU Affero General Public
+  License along with Javascript Crypto Library.  If not, see
+  <http://www.gnu.org/licenses/>.
+
+*/
+
+/*
+Copyright (c) 2006, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.com/yui/license.txt
+Version: 0.11.3
+*/
+
+/* first or middle sibling, no children */
+.ygtvtn {
+	width:16px; height:22px; 
+	background: url(../../images/yui/treeview/tn.gif) 0 0 no-repeat; 
+}
+
+/* first or middle sibling, collapsable */
+.ygtvtm {
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/tm.gif) 0 0 no-repeat; 
+}
+
+/* first or middle sibling, collapsable, hover */
+.ygtvtmh {
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/tmh.gif) 0 0 no-repeat; 
+}
+
+/* first or middle sibling, expandable */
+.ygtvtp {
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/tp.gif) 0 0 no-repeat; 
+}
+
+/* first or middle sibling, expandable, hover */
+.ygtvtph {
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/tph.gif) 0 0 no-repeat; 
+}
+
+/* last sibling, no children */
+.ygtvln {
+	width:16px; height:22px; 
+	background: url(../../images/yui/treeview/ln.gif) 0 0 no-repeat; 
+}
+
+/* Last sibling, collapsable */
+.ygtvlm {
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/lm.gif) 0 0 no-repeat; 
+}
+
+/* Last sibling, collapsable, hover */
+.ygtvlmh {
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/lmh.gif) 0 0 no-repeat; 
+}
+
+/* Last sibling, expandable */
+.ygtvlp { 
+	width:16px; height:22px; 
+	cursor:pointer ;
+	background: url(../../images/yui/treeview/lp.gif) 0 0 no-repeat; 
+}
+
+/* Last sibling, expandable, hover */
+.ygtvlph { 
+	width:16px; height:22px; cursor:pointer ;
+	background: url(../../images/yui/treeview/lph.gif) 0 0 no-repeat; 
+}
+
+/* Loading icon */
+.ygtvloading { 
+	width:16px; height:22px; 
+	background: url(../../images/yui/treeview/loading.gif) 0 0 no-repeat; 
+}
+
+/* the style for the empty cells that are used for rendering the depth 
+ * of the node */
+.ygtvdepthcell { 
+	width:16px; height:22px; 
+	background: url(../../images/yui/treeview/vline.gif) 0 0 no-repeat; 
+}
+
+.ygtvblankdepthcell { width:16px; height:22px; }
+
+/* the style of the div around each node */
+.ygtvitem { }  
+
+/* the style of the div around each node's collection of children */
+.ygtvchildren { }  
+* html .ygtvchildren { height:2%; }  
+
+/* the style of the text label in ygTextNode */
+.ygtvlabel, .ygtvlabel:link, .ygtvlabel:visited, .ygtvlabel:hover { 
+	margin-left:2px;
+	text-decoration: none;
+}
+
+.ygtvspacer { height: 10px; width: 10px; margin: 2px; }
+