[brailleblaster] Improved GUI

Hi guys, just an update on what I am doing.  There were hard-to-catch
bugs in the UTD class, it seemed like all the navigation methods were
written to find XML elements as the first of every children list, and
that only one of them was expected! And because the search for
elements is done in a threaded way in order to keep the window free,
and methods are called recursively, things are tricky to debug.
Fortunately Eclipse is very good at helping the debugging. We are
getting there!

Best regards,

François

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