Fix enabled Save button while viewing Chargeback Rate Assignments
Fix enabled Save button while viewing Chargeback Rate Assignments

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1614982

Fix the button while viewing Chargeback Rates assigned to multiple Tag Categories,
under Cloud Intel > Chargeback > Assignments accordion.

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic