Update release notes (TRootBrowser)

git-svn-id: http://root.cern.ch/svn/root/trunk@33778 27541ba8-7e3a-0410-8455-c3a389f83636

gui/doc/v528/index.html

@@ -41,6 +41,7 @@ For this purpose, a new picture button has been added to the file browser plug-i
 <br>Another button has been added to the file browser plug-in, used for refreshing the current directory in the list tree.
 Refreshing now checks also if files still exist in the current directory 
 (for the case where files have been deleted by the user or by another application)
+<li> Allow to change graphic properties of an object (e.g. a histogram) in a Root file via the context menu from the browser (by opening a ged editor)
 </ul>
 
 <h4>TGSlider</h4>