Show technical details for user problems locally

ABRT DBus service (org.freedestkop.problems) have to be enhnaced in
order to make the "Details" button working for the system problems.
The actual implementaion is base on file system access to problem files
and regular users don't have sufficient rights to see the system
problems. Unfortunately, the dbus service doesn't provide any method
usable to obtain the details.

Related to #64

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Hide the 'Details' button for system problems

Relate to #64

Signed-off-by: Jakub Filak <jfilak@redhat.com>