Defaults does not support all hydraulic options

[lbutler]

The following options are not saved or read from the defaults .ini file

• 'Max. Head Error';
• 'Max. Flow Change';
• 'Demand Model';
• 'Minimum Pressure';
• 'Required Pressure';
• 'Pressure Exponent';
• 'CHECKFREQ';
• 'MAXCHECK';
• 'DAMPLIMIT';