Long delay when multi-selecting bodies in PhAT viewport

REGRESSION
Yes, does not occur in Release-4.14 at CL 3215883

When multi-selecting bodies in the PhAT viewport, there is a significant delay between the user clicking and the editor registering the click.

It works fine when using the Hierarchy panel. This only occurs when clicking on the actual bodies in the viewport.

1. Open QAGame in editor.
2. Open SK_Mannequin_PhysicsAsset in PhAT.
3. In the viewport (not the hierarchy panel), Ctrl+left click multiple bodies.

RESULT

After the first body select, there'll be a ~2 second delay for the following body selects to register