Buttons options

[robouden]

Add other functionality to the three buttons Options could be:

• [ ] Double press . More info at this
• [ ] Long press
• [ ] add direct bucket read out in survey mode, 5 sec/60sec indication.
• [ ] Graphically should follow the shape of the M5stack Core outline

[louisbertrand]

Both do-able with the M5Core2 Touch and Button library. The question is, what to do with those?