Move to construction time, instead of passing to each append() call;
the table's field sizes are, after all, the same for all entries.
Add support for larger tables by allowing more than 16-bit indices.
Task-number: QTBUG-115158
Change-Id: I8f1113482e80838c512da6353fa17b9f365f956a
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
Reviewed-by: Mate Barany <mate.barany@qt.io>
877e77eced