Fixed: No use Ticket::Hook in CustomerTicketZoom (bug#10285).
Squashed commit of the following:

commit 9588fb77414336e6a19a8496727c2503274fe22f
Author: s7design <otrs@s7designcreative.com>
Date:   Wed Feb 5 15:35:50 2014 +0100

    I fixed like you suggested. Thanks for help, I knew that JavaScript was not good option. But with your help all is easier:)

    Thanks Martin
    Zoran

commit 6204bd53adaff245509bb6a833fb3141f9064ce8
Author: s7design <otrs@s7designcreative.com>
Date:   Wed Feb 5 15:01:53 2014 +0100

    [#10285]No use Ticket::Hook in CustomerTicketZoom

    Added default value "Ticket#" for Ticket::Hook if isn't set in config

commit c2be49b83ae4b89640084d5e283c49d2704e23f4
Author: s7design <otrs@s7designcreative.com>
Date:   Wed Feb 5 14:49:20 2014 +0100

    [10285]No use Ticket::Hook in CustomerTicketZoom
Fixed: Customer email suddenly treated by OTRS as 'email-internal' (bug#10182).