Explain more clearly what is the admin password and how to get it (restarting) when doing things like opening the hard drive
In helpdesk we often get users asking how to get the admin password, or even 'what is the admin password' of Tails.
It seems it is not clear for them that they have to add it when starting.
It would be nice to show them a message like the one you get when trying to sudo, that explains better the situation, instead of only coloring in red a part of the message.
Especially when trying to use Nautilus, Synaptic, or maybe also in other situations.