Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
currentEditPart = (ListEditPart) obj;
			}
			else if ( obj instanceof ListBandEditPart )
			{
				currentEditPart = (ListEditPart) ( (ListBandEditPart) obj ).getParent( );
			}
			if ( part == null )
			{
				part = currentEditPart;
			}
			
			if ( currentEditPart == null
					|| currentEditPart != null
					&& part != currentEditPart )
			{
				return null;
			}
		}
		return part;
	}
	/**
	 * Tests if the specified element is on the given tree viewer
	 * 
	 * @param treeViewer
	 *            the tree viewer
	 * @param element
	 *            the element
	 * 
	 * @return true if the element is on the tree, or false else.
	 */