Allow the player preview to update while being seeked/dragged [delivers #74952388]

Do you mean on line 1112? I actually originally had that set to '_lastSeekTime = _position' as well, as this is what was there in 6.8, but after looking at how the preview updated in 6.8 while the slider was being dragged, I found that making it _lastSeekTime = currentTime instead of _lastSeekTime = _position actually made the seeking much smoother than it was in 6.8. If you want me to change it back to _lastSeekTime = _position, though, I will :)