Further improving gesture recognition

So far the minimal bounding box has been used to check that the whole hand is inside the viewport but this proved unreliable when the hand orientation was horizontal/vertical, as the box would be horizontal/vertical as well. Instead, the bounding circle was used. Only if it was completely inside would the gesture considered to be recognised.

Aside from this, to make pointer movement easier pointer movement could be enabled/disabled with gestures, which would make the pointer easier to control as the camera quite probably will not cover all the screen, so the user might find himself moving the hand in and out of the screen towards the desired direction in order to get the pointer to the desired location.