The "active" configuration is not working as it should

[oanalavinia]

Prerequisites: have a working configuration

Steps to reproduce:

1. Go to Administer Wiki -> Other -> AzureAD
2. Tick the Active configuration, in order to disable this provider
3. Save the new configuration
4. Open an incognito window and access the login page

Expected result:
The AzureAD login option is not displayed

Actual result:
The AzureAD login option is still displayed and is working

The only effect of the active configuration seems to be that the other configuration fields are no longer editable when the provider is disabled

Tested on version 1.5.7 with XWiki version 11.10 and Identity OAuth 1.5

[ndascalita]

Issue still present with XWiki 14.10.20 and Microsoft Azure Active Directory Single Sign-On (SSO) (Pro) 1.7.3