XBL Datatable Widget - allow user modifications to auto-increment field
auto-increment field is already implemented in XBL, but currently has admin-set
start, end and increment values.
Needs additional functionality, editable by user in field to reflect field
conditions, such as starting at user-defined values, and counting in
user-defined direction. For example, pisco collections depend on tides, so
collection might start at the end of each transect and work backwards to
halfdway, to beat the tide, then remaining measuerments would start at beginnign
of each transect and work up to halfway, after the tide has come in and covered
the already-measured parts.