Bug 136833 Group key is affected by Generate All button in group.
Description: Group key is affected by Generate All button in group. Steps to reproduce: 1. Insert a list 2. Add a group, select a group key, then click Generate All button. Actual result: Group key disappeared, you have to reset it.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
return intervalChoicesDate;
		}
		else if ( Number.class.isAssignableFrom( columnType ) )
		{
			return intervalChoicesNumeric;
		}
		else
		{
			return intervalChoicesAll;
		}
	}
	private static IChoice[] getIntervalChoicesString( )
	{
		String[] str = new String[]{
				DesignChoiceConstants.INTERVAL_NONE,
				DesignChoiceConstants.INTERVAL_PREFIX,
		};
		return getIntervalChoiceArray( str );
	}
	private static IChoice[] getIntervalChoicesDate( )
	{
		String[] str = new String[]{
				DesignChoiceConstants.INTERVAL_NONE,
				DesignChoiceConstants.INTERVAL_YEAR,
				DesignChoiceConstants.INTERVAL_QUARTER,
				DesignChoiceConstants.INTERVAL_MONTH,
				DesignChoiceConstants.INTERVAL_WEEK,
				DesignChoiceConstants.INTERVAL_DAY,
				DesignChoiceConstants.INTERVAL_HOUR,
				DesignChoiceConstants.INTERVAL_MINUTE,