First SysEx GUI prototype
Not very functional / useful at the moment, but shows off Ardours SysEx support.
Some code has will probably be added to stack those flags nicely, if more of them
occur, and later symbolic display from an XML of SysEx event definitions.
Probably the flags could be shown at the bottom to avoid visual collision with
Program Changes. An even better solution would be to stack up all available flags,
If they collide visually. Any further ideas?