Permit the seek bar to stop only at relevant positions when animations are disabled.

[sleepdeprecation]

When animations are disabled, it is still possible to move around a playback to an individual event using the seek bar (but only going backwards, moving forwards immediately displays the final state of the playback, regardless of where the seek bar is positioned).

This should probably be changed to do the following:

• Act exactly the same as it currently does when animations are enabled.
• Change the internal size of the seek bar to the number of stopping points that exist when animations are disabled (for just a standard playback, it should be two: the starting point and the stopping point).
• Change how seeking on the bar works when animations are disabled so that you move between stopping points, instead of individual events.

[markm208]

I mostly wanted 'skip animations' for storyboards only. I kind of threw it in there for normal playback because it wasn't too hard.

Maybe I shouldn't have done that. I think there is a lot of value in skipping the animation in a storyboard but not a lot of value in a normal playback. I think we should only have the skip animation option in a storyboard playback. I also think that is the easiest solution to your good observation that it is weird.