Add kebab dropdown for reverting current snapshot
Add kebab dropdown for reverting current snapshot

TODO 
* service to handle action, confirmation of action, checking to see if snapshot can be reverted
ManageIQ/manageiq-ui-service,ManageIQ/manageiq-ui-self_service,ManageIQ/manageiq-ui-self_service,AllenBW/manageiq-ui-service,ManageIQ/manageiq-ui-service,ManageIQ/manageiq-ui-service,AllenBW/manageiq-ui-service,AllenBW/manageiq-ui-service,ManageIQ/manageiq-ui-self_service,AllenBW/manageiq-ui-service