New design by @AAlhazwani-WMF:
This involves making the following changes:
- Rename Special:OATHAuth to Special:AccountSecurity
- When the OATHAuth extension is installed, replace the "password" section on the preferences page with a "password and authentication" section that links to Special:AccountSecurity, the same way that we currently add a "Two-factor authentication" section that links to Special:OATHAuth
- Also remove the "Two-factor authentication" section
- On Special:AccountSecurity, add a "Password" section with a "Change password" button that links to Special:ChangeCredentials (just like the one that MW core puts on the preferences page)
