Log Message:
qqc2-desktop-style: update to 5.47.0

* Use pallet property only when using qtquickcontrols 2.4
* Work with Qt<5.10
* Fix height of tabbar
* Use Control.palette
* [RadioButton] Rename "control" to "controlRoot"
* Don't set explicit spacing on RadioButton/CheckBox
* [FocusRect] Use manual placement instead of anchors
* It turns out the flickable in a scrollview is the contentItem
* Show focus rect when CheckBox or RadioButton are focused
* hacky fix to scrollview detection
* Don't reparent the flickable to the mousearea
* [TabBar] Switch tabs with mouse wheel
* Control must not have children
* Constrain scroll