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
if ( refresh )
			{
				refreshValueTable( );
			}
		}
	}
	private boolean canBeBlank( )
	{
		boolean canBeBlank = false;
		if ( PARAM_CONTROL_LIST.equals( getSelectedControlType( ) )
				|| DesignChoiceConstants.PARAM_CONTROL_TEXT_BOX.equals( getSelectedControlType( ) ) )
		{
			if ( dirtyProperties.containsKey( CHECKBOX_ALLOW_BLANK ) )
			{
				canBeBlank = ( (Boolean) dirtyProperties.get( CHECKBOX_ALLOW_BLANK ) ).booleanValue( );
			}
			else
			{
				canBeBlank = inputParameter.allowBlank( );
			}
		}
		return canBeBlank;
	}
	private boolean canBeNull( )
	{
		boolean canBeNull = false;
		if ( dirtyProperties.containsKey( CHECKBOX_ALLOW_NULL ) )
		{
			canBeNull = ( (Boolean) dirtyProperties.get( CHECKBOX_ALLOW_NULL ) ).booleanValue( );
		}