Added support to style iosIcon of picker. Fix for issue #1843 (How can I style picker's iosIcon)
Added support to style iosIcon of picker.
Fix for issue #1843 (How can I style picker's iosIcon)

GeekyAnts/NativeBase,GeekyAnts/NativeBase,GeekyAnts/NativeBase,GeekyAnts/NativeBase,GeekyAnts/NativeBase