QSqlTableModel: use selectRow() for field and row edit strategies

QSqlTableModel: use selectRow() for field and row edit strategies

Calling select refreshes the query data but disrupts view
navigation.

For OnFieldChange and OnRecordChange it makes sense to only
select the row in question. This does not disturb view navigation.

Assume disruption of view navigation is not a problem
for OnManualSubmit because the user or application decides
when submitAll is called.

Task-number: QTBUG-2875
Change-Id: I1e5f68668fb9102f6296d67d543e80daa403f1c4
Reviewed-by: Yunqiao Yin <charles.yin@nokia.com>