[MDEP-562] Make extended tokens default for displaying trees

**[Keir](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=keirlawson)** opened **[MDEP-562](https://issues.apache.org/jira/browse/MDEP-562?redirect=false)** and commented

Now that MSHARED-615 has been merged I would like to propose that this be made the default behavior. By this point most developers have unicode-compatible terminals and given the extended characters make the tree more readable it would be nice to have this as the default option.

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**Affects:** 3.0.0

**Issue Links:**
- [MSHARED-615](https://issues.apache.org/jira/browse/MSHARED-615) Change characters used to diplay trees to make relationships clearer
(_**"depends upon"**_)

No source file or test is named in the issue. Read the linked MSHARED-615 change and trace the dependency-tree display entry point to find where extended tokens are selected; done means extended characters are used by default while any existing opt-out behavior remains available.

Written by the indexing model from the issue text.