Bug 168808 Display text is lost after launching import values dialog
Steps to reproduce: 1.new a parameter; 2.select list box control type; 3.press "Import Values" button to import some values; 4.assign display texts for the imported values; 5.press "Import Values" button to launch import values dialog again; 6.press ok button on dialog; Expected result: The previous assigned display texts are remained. Actual result: The previous display texts are lost.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
{
			changeDefault.setText( BUTTON_LABEL_SET_DEFAULT );
		}
		changeDefault.setSelection( isDefault );
		changeDefault.setEnabled( isEnable );
	}
	private void updateButtons( )
	{
		boolean canFinish = !StringUtil.isBlank( nameEditor.getText( ) );
		if ( canFinish )
		{
			if ( errorMessageLine != null && !errorMessageLine.isDisposed( ) )
			{
				canFinish = ( errorMessageLine.getImage( ) == null );
			}
			if ( columnChooser != null && !isStatic( ) )
			{
				canFinish &= ( getExpression( columnChooser.getText( ) ) != null );
			}
		}
		getOkButton( ).setEnabled( canFinish );
	}
	private void updateCheckBoxArea( )
	{
		
		if ( ( DesignChoiceConstants.PARAM_CONTROL_TEXT_BOX.equals( getSelectedControlType( ) )
				|| PARAM_CONTROL_LIST.equals( getSelectedControlType( ) ) || PARAM_CONTROL_COMBO.equals( getSelectedControlType( ) ) )
				&& DesignChoiceConstants.PARAM_TYPE_STRING.equals( getSelectedDataType( ) ) )
		{
			allowBlank.setEnabled( true );