- rename Theming -> Theme
- made derived colors as Q_INVOKABLE methods available
- rename registerIconProvider -> setupTheme
- inside *.qml files use a singleton import instead of a context
Before this change, every request for a theme value copied the map into the
Qml context including the convert of values QVariant -> QJSString
Change-Id: I1c483fb591336b519d5adab8ad37b42bc5a06720
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>