Log Message:
qqc2-desktop-style: update to 5.70.0

5.67
  Remove scrollbar related workarounds from list delegates
  [TabBar] Remove frame
  Add active, link, visited, negative, neutral and positive background colors
  use hasTransientTouchInput
  always round x and y
  support mobile mode scrollbar
  ScrollView: Do not overlay scrollbars over contents
5.68
  ScrollView: Use scrollbar height as bottom padding, not width
5.69
  [Dialog] Use `ShadowedRectangle`
  Fix sizing of CheckBox and RadioButton
  Use `ShadowedRectangle`
5.70
  Detect QQC2 version at build time with actual detection
  [ComboBox] Use transparent dimmer