Add menu vibration

Phileas requested to merge add_menu_vibration into master

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?

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