Make it possible to use menu models with more than one role
Make it possible to use menu models with more than one role

There was a problem with using menu models with multiple roles.
I also modified it so that if "text" role is defined, this will be
used by default

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