Add menu vibration

This merge request

• add vibration to the menu
• add smooth_vibration module for introducing common vibration patterns/mode

I've basically experimented a bit with coming up with ways to trigger the vibration motor.

This is super primitive.

• menu timeout doesn't trigger timeout vibration
• more sophisticated patterns for vibration motor possible?
• should we have different vibration modi for going up and down
• could we add a vibration mode for when you cycled through the entire menu maybe?
• is the select vibration acceptable
• (how) should we make vibration configurable?