cody: lvlgraph: EdgeSplitMode

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40447 4005530d-fff6-0310-9dd1-cebe43e6787f
cody: lvlgraph: EdgeSplitMode: lgesMergeTarget

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40448 4005530d-fff6-0310-9dd1-cebe43e6787f
cody: lvlgraph: highlight edges: fixed keeping direction

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40449 4005530d-fff6-0310-9dd1-cebe43e6787f