Initial use of Gecko List Box

At this point just integrated into the Dictionary Control
WeSayListView to GeckoListView conversion

Fixed problems with new entry and delete button on the
Dictionary Control.  Converted list boxes on the Missing
Info Control.  Fixed minor problem in DetailList with
previous memory leak changes.
Add GeckoListBox to the CAWL-SIL word gathering screen

Added the list box to this screen.  Had to make some minor
changes because the data type is not exactly the same
as the other two.  Also had to deal with the fact that due
to some strange code, it is possible for the box to come
up with a height of 0.