SDK7: The first mouse click” on a 3D object that has an OnPointerDown handler, will not have an effect, requiring another clic

[cfravel]

Steps to reproduce:

1. Load a scene that has a clickable 3D object.
2. Click just once and drag to position mouse cursor on that object
3. Click once
4. // expected: the effect invoked by its OnPointerDown event handler
5. // actual: nothing happens
6. Click a second time // the effect occurs

Scenes where this can be tested:

• 5,117 has some 3D boxes acting as movie controls. Clicking on the Green box should start the movie on the far screen. Can require a second click. If you see an orange admission ticket, the passcode is ‘test’.
• Cloning the scene in https://gitlab.com/dcl-tech/demo-uis

This is a minor annoyance, confusing, but not terribly harmful