Why "Delete" button in "Certificate manager" is disables? Why certificates are prefilled?

[Yuri]

These two questions bother me in regards to security and trust.
Aren't users themselves the ones who are supposed to make the decision 
if to trust particular authorities?

There are many questionable IMO items there, and I believe users should 
at least be aware that particular authorities for sites they use exist 
and who they are.

I suggest trusting default authorities supplied with browser should be 
made a port option, "off" by default.
Also bug that Delete button is disabled should be fixed.

Yuri