Performance charts: javascript style fixes. (transferred from ManageIQ/manageiq@97912df7c98f0c67e07203591c3cb4e8db617a9b)
Performance charts: javascript style fixes.
(transferred from ManageIQ/manageiq@97912df7c98f0c67e07203591c3cb4e8db617a9b)

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