NEXT-8592 - Change Customer Password

[wexotk]

1. Why is this change necessary?

Fix for issue #879

2. What does this change do, exactly?

• First commit allows you to change a customers password from the admin page.
• The second commit allows you to change the password of an admin user through the Settings -> Users & Permissions (instead of Your Profile). For now it only allows you to change your own password, but when admin roles gets added, it'll be easy to add so a super admin can change other admins passwords too.

3. Describe each step to reproduce the issue or behaviour.

If you go to the customer list, click on a customer and click edit. It should now show two more input fields, "new password" and "confirm new password". If both are equal and above 0 characters (you should probably add some password requirements for future reference), the password will be changed on the user. If the fields doesn't match, an error message will be shown.
Furthermore a success message for when editing a user has been added.

4. Please link to the relevant issues (if any).

#879

5. Checklist

• I have written tests and verified that they fail without my change
• I have squashed any insignificant commits
• I have written or adjusted the documentation according to my changes
• This change has comments for package types, values, functions, and non-obvious lines of code
• I have read the contribution requirements and fulfil them.

[raknison]

Please squash your commits and add Fixes #879 to the message to auto-close this issue.

[raknison]

Please add some description to theCHANGELOG-6.2.md about your additions/changes.

[wexotk]

@raknison Both should be fixed now, but your QA also asked for a minimum length of 8, so I'll look into that.

[leichteckig]

QA approved ✔️

[raknison]

Thanks for your Contribution! 💙