Add setting for vibration length

[Roboleo1010]

Hey, I'd like to suggest a setting where you can set the vibration strengt/ length for the end of the session alert. I think this would be a useful addition, because the vibration is too distracting if you're not finished with your meditation at the exact time.

[dliedke]

Hello, there is a lot of settings already for different vibrations when holding left middle button or touching and holding the screen. Thanks! 😃