Look past voice lookups that found nothing

A motion queued behind a voice fly-to acts on the last flight that moved the camera. A later lookup that was not found, threw, or was cancelled once a newer voice fly-to had begun moved nothing, so the motion looks past it rather than refusing or running early and cancelling the flight still in the air. It never acts at a flight older than the one it started waiting on. A lookup cancelled while still the latest voice flight (a search, a share link, Cockpit) still refuses.

The top-down no-op now reports the camera's real pitch.

src/cameraTilt.test.mjs

@@ -185,6 +185,7 @@ for (const pitch of [-90, -89]) {
     const result = moveCamera({ motion: 'tilt', pitchDeg: pitch });
     assert.equal(result.ok, true);
     assert.equal(result.unchanged, true);
+    assert.equal(result.pitchDeg, Math.round(before));
     assert.equal(getActiveCameraMotion(), null);
     assert.equal(pitchDeg(h.camera), before);
   });