message: removed too agressive preventDefault from input-observer
diff: @@ -231,10 +231,6 @@ namespace InputObserver {
  window.removeEventListener('resize', onResize, false)
  }
  - function preventDefault (ev: Event | Touch) {
  - if ('preventDefault' in ev) ev.preventDefault()
  - }
  -
  function onContextMenu(event: Event) {
  if (noContextMenu) {
  event.preventDefault()
  @@ -273,8 +269,6 @@ namespace InputObserver {
  }
  function onTouchStart (ev: TouchEvent) {
  - preventDefault(ev)
  -
  if (ev.touches.length === 1) {
  buttons = ButtonsFlag.Primary
  onPointerDown(ev.touches[0])
  @@ -286,13 +280,9 @@ namespace InputObserver {
  }
  }
  - function onTouchEnd (ev: TouchEvent) {
  - preventDefault(ev)
  - }
  + function onTouchEnd (ev: TouchEvent) {}
  function onTouchMove (ev: TouchEvent) {
  - preventDefault(ev)
  -
  if (ev.touches.length === 1) {
  buttons = ButtonsFlag.Primary
  onPointerMove(ev.touches[0])
  @@ -313,22 +303,16 @@ namespace InputObserver {
  }
  function onMouseDown (ev: MouseEvent) {
  - preventDefault(ev)
  -
  buttons = getButtons(ev)
  onPointerDown(ev)
  }
  function onMouseMove (ev: MouseEvent) {
  - preventDefault(ev)
  -
  buttons = getButtons(ev)
  onPointerMove(ev)
  }
  function onMouseUp (ev: MouseEvent) {
  - preventDefault(ev)
  -
  buttons = getButtons(ev)
  onPointerUp(ev)
  }
  