Speed button know behaves like the volume button when tabbing forward or...

This PR fixes the following issues in the video player:

The speed button was behaving differently than the volume button when tabbing through its elements (and was broken when tabbing backwards):
When going forward, we would traverse as follows: play/pause button, highest speed to lowest speed, volume button
When going backwards volume button, speed button, highest speed, speed button, highest speed etc.

We now have the following:
Forward: play/pause button, speed button, highest speed to lowest speed, speed button, volume button.
Backwards: volume button, speed button, lowest speed to highest speed, speed button, play/pause button.

This mirrors the behavior of the volume button.