501d19656e
This is a step in cleaning up the Clutter context management. By making it a GObject it's easier to add e.g. properties and features that helps with introspection. For now, this means the context creation is changed to go via a "constructor" (clutter_create_context()). This is so that the global context singleton can be mantained outsid of ClutterContext, until it can be removed. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2016>