Problem with long port names

[emrecanbulut]

Hi,

If you create a SubTree with at least one node having a long port name, that node will be shown as the right-most node in the main tree once you expand the SubTree.

Can be reproduced with this XML:
(See in the XML Action1 comes before Action2 in the Sequence)

<?xml version="1.0"?>
<root main_tree_to_execute="BehaviorTree">
    <!-- ////////// -->
    <BehaviorTree ID="BehaviorTree">
        <SubTree ID="ExampleSubTree"/>
    </BehaviorTree>
    <!-- ////////// -->
    <BehaviorTree ID="ExampleSubTree">
        <Sequence>
            <Action ID="Action1" this_name_is_too_long=""/>
            <Action ID="Action2"/>
        </Sequence>
    </BehaviorTree>
    <!-- ////////// -->
    <TreeNodesModel>
        <Action ID="Action1">
            <input_port name="this_name_is_too_long"/>
        </Action>
        <Action ID="Action2"/>
        <SubTree ID="ExampleSubTree">
        </SubTree>
    </TreeNodesModel>
    <!-- ////////// -->
</root>

This seems somewhat similar to the issue #24 .