import error should be displayed with error value

[agitator]

only admin role sees the full error msg, should be the role that is allowed to import

[jensens]

I don't get what this means, still valid?

[agitator]

happened while importing susbscriber via csv file, the "normal" user just got the standard error page (was an encoding error in that case) instead of an actual status/error msg

[MrTango]

We could catch erros here and show them with portalMessage to the user.