Sleeper hold + yawning (i.e. sleep transmission)

Allow a tile to send other tiles to sleep similar to program mode. (Note: IR LEDs are full bright when button is pressed) 

Implementation would look like the following

```
// press for n seconds, 
// send signal saying force sleep for 2 seconds
// wait for 3 seconds (allows surrounding tiles to broadcast without waking you)
// then go to sleep
```
