[REG 5.10] QSpinBox no longer gets a frame (SH_SpinBox_ButtonsInsideFrame check is wrong)

Spin boxes no longer get a frame with common styles (Windows, Breeze, Skulpture), because the check if QStyle::SC_SpinBoxFrame needs to be included in option->subControls is wrong. The commit in qcommonstyle.cpp made 'true' the default value for SH_SpinBox_ButtonsInsideFrame, while the check in qabstractspinbox.cpp checks for a 'false' value to include the QStyle::SC_SpinBoxFrame.

http://code.qt.io/cgit/qt/qtbase.git/commit/src/widgets/styles?id=80515c811a4c455d7f2fb9ded751b2406b08d045

http://code.qt.io/cgit/qt/qtbase.git/commit/src/widgets/widgets/qabstractspinbox.cpp?id=80515c811a4c455d7f2fb9ded751b2406b08d045