Qt: don't save A to B state when the input item changes. Also go to A if before current time is before A

Close #1783 ( rest is 1646 duplicate)

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Close #1459

This hides all stream features from the Stream/Save dialog (Sout)
This resolves a little bug too: the dialog did not refresh correctly when switching between stream and save.

Switch to active button color before making the actual activation. This gives us a small chance to actually SEE the button be activated before the menu continues.

http://forum.videolan.org/viewtopic.php?f=14&t=49386

I won't say the code is bad, we are way beyond that.

It is some sort of workaround for some DVD menu.

includes last-minute string additions to the OSX and Qt4 interfaces

Now that swscale can handle RGB chroma's, let's try to use is where we can, it is likely a lot faster.