SAAS-417: Disable Live Chat for Starter Plans

* Disable Live Chat for Starter Plans
SAAS-417: quick fix for typo
Merge branch '2.5.x-saas' into cc-5709-airtime-analyzer-saas
Merge branch 'cc-5709-airtime-analyzer-saas' of github.com:sourcefabric/Airtime into cc-5709-airtime-analyzer-saas