Bug 20819: (Follow-up) Show more clearly that a user gave no consent

Bug 20819: (Follow-up) Show more clearly that a user gave no consent

See comment60 on Bugzilla.
Although I intentionally did not want to show date and time of refusal,
we can obviously add one line saying that we already have a no.

Test plan:
Login without consent and see no additional line.
Agree and verify that you see the registered on xxx line.
Disagree and verify that you now see "You indicated recently...".

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>