Fix Namespace shared runners enabled check

This method is used to determine whether or not to show shared runners
information in the UI. Even though we now want to count minutes when
shared runners are disabled, I don't think we want to change how
anything appears in the UI since legitimate uses of shared runners won't
be effected by this change.

ee/app/models/ee/namespace.rb

@@ -250,9 +250,9 @@ module EE
       @ci_minutes_quota ||= ::Ci::Minutes::Quota.new(self)
     end
 
-    # The same method name is used also at project and job level
+    # The same method name is used also at project level
     def shared_runners_minutes_limit_enabled?
-      ci_minutes_quota.enabled?
+      any_project_with_shared_runners_enabled? && ci_minutes_quota.enabled?
     end
 
     def any_project_with_shared_runners_enabled?