train_details: expose IRIS details (evevn if unknown)

          <span class="reason">

%=        $pair->[1]

          </span>

%         if (@{$pair} >= 5 and $pair->[2] and $pair->[3] and $pair->[4]) {

            <%= $pair->[2] %>

%           if ($pair->[3]->day_of_year != $dt_now->day_of_year or $pair->[4]->day_of_year != $dt_now->day_of_year) {

              (<%= $pair->[3]->strftime('%d.%m. %H:%M') %> → <%= $pair->[4]->strftime('%d.%m. %H:%M') %>)

%           }

%           else {

              (<%= $pair->[3]->strftime('%H:%M') %> → <%= $pair->[4]->strftime('%H:%M') %>)

%           }

            – Details unbekannt

%         }

%       }

%       else {

%         if ($pair->[1]{icon}) {