[Tails-ux] Notifications to quick and gone

When i test Tails (tails-amd64-3.11.iso) in VirtualBox i see some
messages (notifications) at the top.

I see 3 different messages. They are about using non-free virtulization,
system clock being updated and tor is conntected to the internet.

Only one message at a time but at least two of them go away
automatically and if i click on top of the screen to see noticifations i
see only one.

So its a little hard to read the messages expect the last one so the two
first are no so usefull when i only have a moment to read them.

I dont know if this is a problem with Tails and GNOME.