Provide alternativ login options as backend list, too

aleksis/core/util/core_helpers.py

@@ -323,6 +323,11 @@ def custom_information_processor(request: HttpRequest) -> dict:
 
     return {
         "FOOTER_MENU": CustomMenu.get_default("footer"),
+        "ALTERNATIVE_LOGIN_VIEWS_LIST": [
+            a[0]
+            for a in settings.ALTERNATIVE_LOGIN_VIEWS
+            if a[0] in settings.AUTHENTICATION_BACKENDS
+        ],
         "ALTERNATIVE_LOGIN_VIEWS": [
             a for a in settings.ALTERNATIVE_LOGIN_VIEWS if a[0] in settings.AUTHENTICATION_BACKENDS
         ],