Refactor: Rename variable
Refactor: Rename variable

So, the name reflects more of the semantics and less of the position
in the view. Anyway, these messages are no longer shown on bottom. They
are often times shown on the top, now.
(transferred from ManageIQ/manageiq@88d4ce33898fdd6821eca3bc07b029c06c9ceb77)

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