dev/core#291 Allow for field size to be set for password fields

[seamuslee001]

Overview

Allow for the size of a password field to be set in the props

Before

password fields were all of one size

After

password fields can be any size.

Technical Details

This replicates the setting of the props['size'] as per text number email etc fields

ping @eileenmcnaughton @monishdeb @totten

[civibot]

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[eileenmcnaughton]

makes sense - 'size' is what we use for length in other places?