[#52] Add StaticPicker component that doesn't use vue-virtual-scroller.
The component is compatible with Picker, just import and use StaticPicker instead.
It is a bit slower, but easier to customize (especially, if you need a custom scroll bar style).
Also, vue-virtual-scroller also may lead to rendering problems when Picker is used inside the dialog (in particluar, QDialog from Quasar Framework).
The StaticPicker might also be useful here, see #57 for other workarounds (disable animation, trigger vue-virtual-scroller update after rendering).