Calling clutter_actor_show_all() on the stage and overlay_group breaks
the ability for plugins to create initially hidden actors. Call
clutter_actor_show() instead.
We need to be getting ConfigureNotify events for these, so we can respond
to changes in position of these windows. We cannot add this to windows
Metacity manages, as this makes it got mental.
ClutterActors for hidden windows (such windows on different than active
workspaces and windows that are minimized) are available, and reflect the
actual state of the window. This is intended for use in task-switchers etc.
This feature is disabled by default (due to increased demand on resources),
and can be enabled through the metacity/general/live_hidden_windows gconf key.
A trivial sample window switcher is included in the scratch plugin (activated
by clicking on the slide out panel).
