Adding the option to disable password reminder.

Note: this only disables the option to disable password reminder. It still needs to be determined if there is actually any functionality that executes, if the password reminder is enabled. At the moment, there doesn't seem to be anything in the core making use of the enabling.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| Refs tickets  | -
| License       | MIT
| Doc PR        | -