Fixed the crash when the accordions in compare/drift are clicked.
Fixed the crash when the accordions in compare/drift are clicked.

A setting for @keep_compare = true was missing for the panel_control
action causing @compare to have a nil value which was causing the crash.

https://bugzilla.redhat.com/show_bug.cgi?id=1114700
(transferred from ManageIQ/manageiq@b937d5b19a3b03c0e82cf08ef90893f16e3881ff)

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