QoL feature: Pause Playback upon Navigation

[ZestyRaraferu]

This is brought up by a post in EroScript that I think could be a QoL enhancement.

When a navigation key (eg. previous/next action, middle mouse button) is pressed during playback:

Current behavior: Navigation performed but playback continues. Glitching back and forth.

Suggested Behavior: When a navigation key is pressed during playback, pause playback, and (then) perform the navigation action.

[OpenFunscripter]

I think that's doable