This resizes the columns to make the fit in the available widget width
without scrollbars. This is made possible by a new function,
SizeColumnsToFit(), which is adapted from Outliner.cpp:applyDelta().
Also add a resource for minColumnWidth.
position. Plus, it updated the row/column count before making the callback,
so you could no longer access the userData with XtVaGetValues.
Also add XmLTreeDeleteChildren() to XmLTree.
This code written by Steve Lamm <slamm@netscape.com> and reviewed by
ramiro.
slamm
ramiro
ltabb