message: Avoid taking action when shift modifier is used in autocompleteinput (mac)
diff: // NSLog(@"EventCode: %hu", [event keyCode]);
  if ([event keyCode] == kVK_DownArrow)
  {
  + if ([event modifierFlags] & NSShiftKeyMask)
  + {
  + [super keyUp:event];
  + return;
  + }
  if (self.autocompleteTableContainer.hidden)
  {
  [self toggleTableView:(int)self.autocompleteTableView.numberOfRows];
  