The "insert before" and "insert after" buttons will drop a menu to
select the new triplet mode, allowing triplets with different modes to
be inserted with one less mouse click.
The "insert copy" button still does the old behaviour of inserting a
copy of the currently selected triplet.
The knowledge of how colour, character etc parameters fit within the
address and data triplets is no longer required. We now present
widgets that explicitly refer to colour, character that are more
user friendly.
