Add force feedback / rumble feature for supported gamepad + browser combinations.

[MengelCode]

I do not know why this was not on the bucket list before.

[MengelCode]

Would possibly also make sense to address the vibration API on phones.

[MengelCode]

A bare-bones implementation of the functionality is now in the respective development branch and has been tested successfully with Chromium, on PC with a gamepad. Same must be done for mobile vibration function and then all relevant code parts must call it...