Entity grip controls are too large when viewing from active camera perspective in photosphere

[mellinger]

The inspector is amazing, thanks for all the work on it.

In an effort to be able to place objects visually within a Photosphere in the A-Frame inspector, I want to be able to see things from the primary camera's POV. However, once you set the primary camera to "active" within the inspector, the grip controls relative to the size of the entities are comically large and unusable.

Steps:

1. Open the inspector on this example: https://aframe.io/examples/showcase/360-image-gallery/
2. Click on the Camera entity and check "Active" under the "Camera" section on the right panel.
3. Try to reposition the panels' X value using the grip controls. Observe this is very challenging.

Thanks!