Bug 145520 Group name will not show up in group list if the group use default name and key expression has no value
Description: Group name will not show up in group list if key expression has no value. Steps to reproduce: 1. Insert a table into report, bind it to a data set 2. Switch to property editor -> groups 3. Click on add button to open new group dialog, then press ok button Expected result: A new group with default name will be added to group list Actual result: A new group is added to group list, but without group name. But when let group tab lost focus and get focus again, you can see the group name.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
* @deprecated since BIRT 2.1. find the message in resource path.
	 */
	private File getModuleFolder( )
	{
		if ( systemId == null )
			return null;
		return new File( systemId.getFile( ) );
	}
	/**
	 * Finds a custom color by name.
	 * 
	 * @param colorName
	 *            the custom color name
	 * @return the custom defined color that matches, or <code>null</code> if
	 *         the color name was not found in the custom color palette.
	 */
	public CustomColor findColor( String colorName )
	{
		StructureDefn defn = (StructureDefn) MetaDataDictionary.getInstance( )
				.getStructure( CustomColor.CUSTOM_COLOR_STRUCT );
		return (CustomColor) StructureRefUtil.findStructure( this, defn,
				colorName );
	}
	/**
	 * Finds a config variable by name
	 * 
	 * @param variableName
	 *            the configure variable name
	 * @return the config variable that matches, or <code>null</code> if the
	 *         variable name was not found.