Modify view_graph and view_hybrid buttons' visibility condition, so they won't be visible when there is no graph to show (transferred from ManageIQ/manageiq@3d10d2dff6d45597262afaa7dc0c8b068b8f665c)
Modify view_graph and view_hybrid buttons' visibility condition, so they won't be visible when there is no graph to show
(transferred from ManageIQ/manageiq@3d10d2dff6d45597262afaa7dc0c8b068b8f665c)

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