Add method Help::createDefaultOptionSort to create a Comparator following the command configuration

[remkop]

Add method Help::createDefaultOptionSort to create a Comparator following the command configuration:

• if Command#sortOptions is true, sort by the options short name
• if @command#sortOptionsis false, and any of the options have a non-default value forOption#order`, then sort by this order attribute
• otherwise, return null to indicate options should be shown in definition order