Bug 186940 Style name in theme cannot be identify by auto when reopen the library[01]
Description: Style name in theme cannot be identify by auto when reopen the library[01] Step: 1.Open a library and add a theme 2.New a style on the theme and use the default name that is "NewStyle" 3.Save the library, close it and reopen it again. 4.New another style on the same theme Actual result: The default style name on second times is also "NewStyle" Exception result: The default style name on second times is "NewStyle1"
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/Theme.java
return handle( module );
	}
	/**
	 * Returns an API handle for this element.
	 * 
	 * @param module
	 *            the report design of the row
	 * 
	 * @return an API handle for this element
	 */
	public ThemeHandle handle( Module module )
	{
		if ( handle == null )
		{
			handle = new ThemeHandle( module, this );
		}
		return (ThemeHandle) handle;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#getSlot(int)
	 */
	public ContainerSlot getSlot( int slot )
	{
		assert ( slot == STYLES_SLOT );
		return slots[STYLES_SLOT];
	}
	/**
	 * Gets all styles including styles in css file.