Ticket graph connection finding/handling patch
The original way the ticket links were finded and handled has a flaw. If
a ticket was reached first in a 'longer' path/way than the shortes way
from the root ticket, it got a bigger CurrentDepth as it should be. Later
this ticket were skipped because it was 'already seen' but the
CurrentDepth were not checked.

To handle connections and CurrentDepth correctly, the whole algorithm
should be rewriten from depth-first to child-first search.