This include inverting the order of table view rows so the newest is
at the top, without that the Qt MVC interactions when using a database
table based model is too slow and complex to manage.
The table views now have sort by column capability in the normal way
(click column header to reverse sort order) for timely logging and
non-disruption of Tx starts the log view should be sorted in
descending time order and scrolled to the last row added. Without that
Fox and contest logging will work but serious delays may be invoked
that disrupt operation.
Pending edits are now discarded when adding a new log contest or Fox
log record. Also switch to commit on fields change edit strategy so
there should be no pending edits now anyway.
Move to OnRowChange edit strategy for log tables so that deletes from
view can be implemented cleanly.
Improve layout of log view tables by resizing to contents.
Basic validation, must have non-empty exchange sent and received.
Abstracted log view window widget behaviour into a base class. Turned
on auto resize to row height in log view windows and enabled
alternating colours. Convert empty fields to NULL when inserting new
log table rows to signify missing data. Trap insert row errors when
adding to contest log table so that logging can be held back if
constraints are not met. Re-factored log QSO processing to try insert
row into log table first and pop up a message box if constraints are
not met, this pops up the Log QSO window in case it was initiated by
an auto log event.
