SplitterRow: introduce property restrictHandlePositions
SplitterRow: introduce property restrictHandlePositions

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