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
{
				return null;
			}
		}
		
		if ( part instanceof GridEditPart )
			return null;
		return part;
	}
	/**
	 * Returns list editpart.
	 * 
	 * @param editParts
	 *            a list of editpart
	 * @return the current selected list editpart, null if no list editpart,
	 *         more than one list, or other list editpart. List band editpart is
	 *         also a type of list editpart.
	 */
	public static ListEditPart getListEditPart( List editParts )
	{
		if ( editParts == null || editParts.isEmpty( ) )
			return null;
		int size = editParts.size( );
		ListEditPart part = null;
		for ( int i = 0; i < size; i++ )
		{
			Object obj = editParts.get( i );
			ListEditPart currentEditPart = null;
			if ( obj instanceof ListEditPart )
			{