Make icons transparent...

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@2751 a333f486-631f-4898-b8df-5754b55c2be0

datamodels/2.x/itop-storage-mgmt/datamodel.itop-storage-mgmt.xml

@@ -773,7 +773,7 @@
           </attributes>
         </naming>
         <display_template/>
-        <icon>images/nas.jpeg</icon>
+        <icon>images/nas.png</icon>
         <reconciliation>
           <attributes>
             <attribute id="name"/>