Update release notes (browser)

git-svn-id: http://root.cern.ch/svn/root/trunk@33812 27541ba8-7e3a-0410-8455-c3a389f83636

gui/doc/v528/index.html

@@ -42,6 +42,7 @@ For this purpose, a new picture button has been added to the file browser plug-i
 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)
+<li> Size of directories, trees, and objects associated to keys inside Root files, or any kind of browsable object can be displayed in their associated tooltip, as soon as their GetObjectInfo() method returns their size as a long long int formatted in a const char * ("%lld")
 </ul>
 
 <h4>TGSlider</h4>
@@ -49,4 +50,3 @@ Refreshing now checks also if files still exist in the current directory
 <li> Added <tt>SetEnabled(Bool_t)</tt> and <tt>SetState(Bool_t)</tt>, allowing to disable or enable the TGSlider widgets (will be greyed if disabled).
 </ul>
 
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