Support Change Password UI needs work

[dd32]

When one wants to change their WordPress.org password, some people make their way to their support profile, and if they make it that far, this is what they see:

It's not clear that clicking 'Generate Password' is how you set a custom password

Upon clicking Generate Password, you see this:

Not the greatest, but it's obvious (to me) that you can change the password.

However, once you change the password to a "bad" password, you see this:

That confirm box is basically "I confirm I want to use a weak password" and should say that, or a variant of it.

I suspect this is mostly core bbPress behaviours, but creating this here as we probably want a better UX on WordPress.org regardless.