Bug 163749 Import BIRT runtime package to wtp will leave old birt files.
Description: Import BIRT runtime package to wtp will leave old birt files. Steps to reproduce: Prepare two birt builds. 1. Create a new BIRT Web Project with one build. 2. Use another build to open the same workspace, select the project and click Business Inteligent and Reporting Tools->Import BIRT runtime component. Expected result: Old birt runtime package will be replaced with new runtime package. Actual result: Old birt plugins were kept and new birt jar files are imported. e.g. org.eclipse.birt.report.engine_2.2.0.v20061101-0630.jar org.eclipse.birt.report.engine_2.2.0.v20061107-0635.jar
viewer/org.eclipse.birt.integration.wtp.ui/src/org/eclipse/birt/integration/wtp/ui/internal/dialogs/BirtConfigurationDialog.java
* Value for "BIRT_VIEWER_LOG_LEVEL" setting
	 */
	protected Button btLogLevel;
	/**
	 * Value for "BIRT_OVERWRITE_DOCUMENT" setting
	 */
	protected Button btOverwrite;
	/**
	 * Value for "BIRT_VIEWER_MAX_ROWS" setting
	 */
	protected Text txtMaxRows;
	/**
	 * Value for "BIRT_VIEWER_LOG_LEVEL" setting
	 */
	protected Combo cbLogLevel;
	
	/**
	 * default contrustor
	 * 
	 * @param parentShell
	 * @param properties
	 */
	public BirtConfigurationDialog( Shell parentShell, Map properties )
	{
		super( parentShell );
		this.properties = properties;
	}
	/**
	 * default contructor
	 *