password visibility toggle

[TanyaStere42]

Feature description and context

When signing in, a user may be unsure in what they entered when typing their password. Making a toggle button to display/mask the entered password will make this process easier (and is something of an industry standard)

Feature sign-off requirements

• leverage material icons
• eye: password text is visible
• eye closed/slashed out: password text is masked
• either way, submission validation process works