Bug 136571 Drop property is displayed in Property Editor for all kinds of cells.
Description: Drop property displayed in Property Editor for all kinds of cells. Drop property is only supported by cells in group but it is listed in every kinds of cells even in grid cell which will mislead users.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SimpleGroupElementHandle.java
}
	/**
	 * Returns if the property is invalid in Masterpage.
	 * 
	 * @param propName
	 *            the property name to check
	 * 
	 * @return true if the property is invalid in Masterpage, false otherwise.
	 */
	private boolean isInvalidInMasterPage( String propName )
	{
		for ( int i = 0; i < elements.size( ); i++ )
		{
			DesignElementHandle container = ( (DesignElementHandle) elements
					.get( i ) ).getContainer( );
			while ( container != null )
			{
				if ( container instanceof MasterPageHandle )
					if ( ReportItemHandle.BOOKMARK_PROP.equals( propName )
							|| ReportItemHandle.TOC_PROP.equals( propName )
							|| StyleHandle.PAGE_BREAK_AFTER_PROP
									.equals( propName )
							|| StyleHandle.PAGE_BREAK_BEFORE_PROP
									.equals( propName ) )
						return true;
				container = container.getContainer( );
			}
		}
		return false;
	}