RingLock : Fix animation

When middle ring is selected, only the target's of the other two rings
are being set to invisble. Hence upon releasing the middle ring,
the show function returns at line 307.

To reproduce :
Move middle ring around and let go.
You'll see the other two rings show up at an offset,
and invalidate properly a few seconds later.

This addresses that issue and the missing animations.

Change-Id: I74f903293ea39af3ba88d7ca371527cc6945f3cc