Redmine

Is there a way to change/add a new format for a custom field?

Specifically, I want to be able to have a custom field that holds a password for a different system. I'd like to have that password masked with dots (like normal password protection behavior) in the display. Exactly the way it behaves on the plugin settings page using the password_field_tag. I need to be able to keep the settings at the project level and not at the plugin settings level.

I realize that the password is stored in the database as plain text, but if there is a way around that, that would be great too!