Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
public void onSave( )
	{
		module.onSave( );
	}
	/**
	 * Removes a given validation listener. If the listener not registered, then
	 * the request is silently ignored.
	 * 
	 * @param listener
	 *            the listener to de-register
	 * @return <code>true</code> if <code>listener</code> is sucessfully
	 *         removed. Otherwise <code>false</code>.
	 */
	public boolean removeValidationListener( IValidationListener listener )
	{
		return getModule( ).removeValidationListener( listener );
	}
	/**
	 * Checks the element name in name space of this report.
	 * 
	 * <ul>
	 * <li>If the element name is required and duplicate name is found in name
	 * space, rename the element with a new unique name.
	 * <li>If the element name is not required, clear the name.
	 * </ul>
	 * 
	 * @param elementHandle
	 *            the element handle whose name is need to check.
	 */
	public void rename( DesignElementHandle elementHandle )