Preventing auto-filling of passwords in config #4362

We previously had set autocomplete="off" on password fields, but
browsers seem to ignore that now.

MDN suggests [1] to use autocomplete="new-pas

Preventing auto-filling of passwords in config #4362

We previously had set autocomplete="off" on password fields, but
browsers seem to ignore that now.

MDN suggests [1] to use autocomplete="new-password", so that's what's
used now. In addition autocomplete="off" is set on the form as a whole.

Will that fix the issue once and for all? Doubtful:

> This attribute is a hint to browsers; some may not comply with it.

[1] https://developer.mozilla.org/en-US/docs/Web/Security/Practical_implementation_guides/Turning_off_form_autocompletion

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code style: line breaks

coding style: control flow whitespaces

codestyle adjustments: function declaration braces/spaces

codestyle adjustments: class declaration braces

Apply rector fixes to config plugin

Moved settings to their own namespace