Improve user password change UX

Here are some changes I propose to improve the password reset form:

• Call it "Change password" in the frontend, since the word "reset" is usually used in other context (you forgot your password and need to "reset" it via email)

• Include a field to confirm the new password, as this makes it less likely that the user sets up a new password with a typo. The admin user management screen has that, so I could reuse that.

• Add a button to view the password, in case the user wants to confirm it was typed correctly.