move site message to footer
show message inline when disgarded
update aria label to reflect new position/role
remove role once it cannot be dismissed
dont move message to footer

- duplicate in the footer, as it's just a temporary mssage about the beta, not a universal messageing mechanism
always show the message in the footer
put footer message behind switch
message announces it's been hidden
construct the messages only if we need to
always create put the message in the footer for these two messages

then handle display based on the whether the message thrown up in a dialogue or it has already been dismissed
fix syntax
test for event
undo label change
add some comments
pin all banner messages to the footer

via the contstructor, not in a couple of instances
;
store element reference
er...make variable available for use!
add side bar to footer message
Merge pull request #5582 from guardian/footer-message

Pin ‘banner’ messages to footer once they’ve been dismissed