TestBench: Add currentText and currentIndex properties
TestBench: Add currentText and currentIndex properties

Change-Id: I2e101e19e4cc2b76529559a8efea0f6eb1bc811e
Reviewed-by: Jens Bache-Wiig <9cea9d70b08f8210134ec5959114f72bad51ed1d@digia.com>

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