Added isZoomed method to ChartView...
Added isZoomed method to ChartView
isZoomed() method added also the the QML side.
Change-Id: Ic0e878bb383316f37a4136d4b920849f1f1853ef
Task-number: QTRD-3667
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@theqtcompany.com>