Fix shortcut capabilities

The shortcuts do not work when the user is interacting with the image.
To reproduce the issue:
1) Click on a button;
2) Type a shortcut key, such as `p`. This works as expected --- the object spins in 3D;
3) Click somewhere in the 3D image;
4) Type a shortcut key, such as `p`. This does not work as expected ---the object does not spin in 3D.

Expected behavior: all shortcuts should work in situations 2) and 4) .