Bug 1101603 - RTL fixes for player.

-Force the player control order to LTR.
-Fix the Player cover in RTL.
-Adjust the progress alignment.
One minor issue I see here is that the remaining time is right-aligned and it means that, since the digits in our font aren't all the same width, the minutes part of the number shifts left and right each second. I won't r- the patch because of this, but it might be worth asking UX if that's acceptable.