fix(password): ensure consistency in prompt appearence

[matteosacchetto]

This PR fixes a small inconsistency in the presentation of the password prompt.

In the previous implementation, the prompt was missing a space between the message and the value, when the value was empty.
This fixes that and also makes sure that if you use do not pass a mask there is not an additional space between the message and the helpTip

This ensures that the password prompt is consistent with the input prompt (which already implements a similar fix), and ensures that it is consistent with how the password prompt appeared before the "style customization" update (ex. v1.1.15)

[codecov]

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Additional details and impacted files

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  Hits            ?     4835           
  Misses          ?      147           
  Partials        ?        8           

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[SBoudrias]

Thanks!