More fine grained control over grid in QTableView/QTableWidget

Sort of a duplicate of closed [ignored IMO] issue https://bugreports.qt-project.org/browse/QTBUG-14515

Currently it's not possible to choose whether QTableView grid should have only vertical or horizontal grid lines. Trying to compensate for this with a stylesheet rule or an item delegate does not give a satisfactory result when trying to "emulate" vertical grid lines, despite what's claimed in the closed issue mentioned above. Those methods only renders a grid line for data rows, not remaining empty space.

I attached screenshot of result when using delegate code. It's not pretty, and a show stopper when trying to show a nice grid in OS X style.