better validation on the refex concept filter, allow to show refexes
that aren't in the list.
don't allow non-refex concepts into the list, show value of column
required value
another convenience constructor
refactor out the nodebuilder code so it can be re-used in other gui
panels
add validator details
use better API
reuse the code from other refex editor GUIs to get proper input nodes
for the various datatypes on the default value selection.  Get rid of
all of the ad-hoc data storage APIs, replace with refex API stuff.
Cleanup management of data from page to page, deal with various bugs in
the old code where things kepts being randomly lost.
gui cleanup
refactor the dynamic refex details viewer, make the list view
re-useable.  Cleanup the display a little bit.
more API cleanup, fix resizing issues.
remove old code
more cleanup
another TODO
initial work on adding validator fields to the GUI - a few more steps to
go.
Add a convenience method for GUI use.
More convenience methods
another TODO
better toStrings for validator data and default data
validate duplicate FSN up front
More work on integrating the validators into the various GUI places.