Basicly, this PR, exchange the mailer with the mass mail off options.
This is made because mass mail does not have nothing to do with the options that follow, but mailer is what trigger that options.
Also makes minor code style changes in mail part of the config xml.
Before
After
Testing Instructions
Apply patch
Check the showns in the mail part of the global config.
I have tested this item successfully on f1ffb82
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