space-leap: fix scene management on 3d zoom star lib

A scene was being created even though we passed our own.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
space-leap: fix scene attachment / usage on the star focus

We can see the earth now on scene 2!

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>