Sort by raw value instead of string value

[rak-phillip]

Summary

This ensures that the Last Login, Disabled In, & Deleted In columns in the Users table are sorted by their epoch time values instead of the string representation.

Fixes #10821

Occurred changes and/or fixed issues

• Updates the sort key for userLastLogin, userDisabledIn, & userDeletedIn

Areas or cases that should be tested

• Sorting of the users table

Checklist

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[mantis-toboggan-md]

LGTM