new3dapi: use CameraInputController for bullet tests

Return true when activateKey is set, so other input processors arent processed.
Add CameraInputController to the bullet tests, which requires Ctrl to be clicked (can be changed to work on android when we have some sort of CameraGestureController).
Middle button (zoom) and right button (move) does work, but I didnt want to bloat the instructions so didnt notice them.