Hide some infos for livestreams

[razzeee]

Livestreams have some confusing ui elements:

• Progressbar
• Current timestamp
• Total timestamp

We can access if it's a stream via Player.IsInternetStream.
Not sure it's wise to do that as it might be a valid usecase for "not-live-streams-but-streams"?

@ronie @phil65 @HitcherUK

[ronie]

these 'confusing' timestamps are provided by core.
so it should be fixed there imo.

[razzeee]

Agreed, implementing an interface like pvr uses might be the best thing to do. I think @peak3d mentiond that that's the plan for inputstream.