Don't override bindings on SpinBox.
Don't override bindings on SpinBox.

- This removes some simplicity but since it breaks
  any bindings you make on the arrow buttons, it has
  to be solved in a different way than this.

richardmg/qtcomponents,drgvond/qtquickcontrols,jfaust/qtquickcontrols,mizukusak/qtquickcontrols,drgvond/qtquickcontrols,drgvond/qtquickcontrols,mizukusak/qtquickcontrols,richardmg/qtcomponents,kobolabs/qtquickcontrols,richardmg/qtcomponents,jfaust/qtquickcontrols,jfaust/qtquickcontrols,mizukusak/qtquickcontrols,kobolabs/qtquickcontrols,kobolabs/qtquickcontrols