TabView: Don't give a default size to the TabView
TabView: Don't give a default size to the TabView

Task-number: QTBUG-30031

Change-Id: I389f955c102e1954a1a7c1d5ac6b1a4f871f39d9
Reviewed-by: Jens Bache-Wiig <9cea9d70b08f8210134ec5959114f72bad51ed1d@digia.com>

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