Bug 196767 "Finish" button does not take effect when first use CSS file then import CSS style in a library [0303]
Description: "OK" button is disabled when first use CSS file then import CSS style in a library. Build number: 2.2.1.v20070717-0630 Steps to reproduce: 1. New a library, in Outline view, right click to select default Theme->Use CSS File..., select one css file, click "OK". 2. in Outline view, right click to select default Theme->Import CSS Style..., select one css file, click "Select All" button, click "OK". Expected result: "OK" button is enabled. Actual result: "Ok" button is disabled. Error log: N/A
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ThemeHandle.java
*            the module
	 * @param element
	 *            the model representation of the element
	 */
	public ThemeHandle( Module module, DesignElement element )
	{
		super( module, element );
	}
	/**
	 * Returns the styles slot of row. Through SlotHandle, each style can be
	 * obtained.
	 * 
	 * @return the handle to the style slot
	 * 
	 * @see SlotHandle
	 */
	public SlotHandle getStyles( )
	{
		return getSlot( IThemeModel.STYLES_SLOT );
	}
	/**
	 * Gets all styles in theme,include css file.
	 * 
	 * @return all styles.each item is <code>StyleHandle</code>
	 */
	public List getAllStyles( )
	{
		Theme theme = (Theme) getElement( );
		List styles = new ArrayList( );
		List styleList = theme.getAllStyles( );