Rolling friction property of Rigidbody Component

[LeXXik]

If playcanvas/engine#2785 commit goes through, the Editor would need to add a new number field property to the Rigidbody Component to allow setting a rolling friction of a rigidbody:

{
        name: 'rollingFriction',
        title: 'Rolling Friction',
        type: 'number', default: 0, min: 0, max: 1, precision: 4,
        description: 'Torsional friction orthogonal to contact point normal. Generally, you want this to be zero or close to zero. Defaults to 0.'
}