[FixRM #4730] - Print default values for unset options

History here:

Hope this pull request helps to solve the issue. There are three values for whose default value is not being printed:

* Prompt: because the default CWP codes break table indentation
* PromptChar: because the default CWP codes break table indentation
* PromptTimeFormat: showing empty because it's empty by default.

Anyway, Prompt and PromptChar default values are shown in the description. So, hope it's not a big deal.