private void registerInput() {
        inputManager.addMapping("toggleCamera", new KeyTrigger(KeyInput.KEY_SPACE));
        inputManager.addListener(this, "toggleCamera");
    }
A test for issue https://github.com/jMonkeyEngine/jmonkeyengine/pull/1692.
We are testing to see if disabling then re-enabling the chase camera keeps the correct flags
set so that we can still rotate without dragging
jme3-examples/src/main/java/jme3test/input/TestIssue1692.java