Read duration from either options or player property in progressbar

[Dananji]

I was still seeing the shortened progressbar on initial load in the Ramp demo site (#567) in Firefox. It seems on the initial load of the page it's safer to read the duration from options passed into the VideoJSProgress component rather than relying on canvasDuration property of the player instance.

[cjcolvar]

👍

[Dananji]

This was still being buggy, so I removed the duration prop to progress bar component since that prop stays the same in subsequent player refreshes. Now the progress bar component relies on the player.canvasDuration property which gets updated on canvas change.

[cjcolvar]

Looks good!