Simplify button debounce a little
Simplify button debounce a little

- Make use of shortcutting to avoid millis() call
- Set state /inside/ update func using reference, little gross but
  seems cleaner in this case.

sheaivey/rx5808-pro-diversity,RCDaddy/rx5808-pro-diversity,RCDaddy/rx5808-pro-diversity,sheaivey/rx5808-pro-diversity