fix: more aggressively debounce tape playback

[robbielyman]

closes #1758

there's a lot to dislike here—i added a half-second slowdown to every time fileselect exits—this is because if tape playback is going to start, it needs a buffer of about that long from after being stopped.

that being said, i believe the reported issues are now fixed.

[tehn]

thanks. i'll roll out an update very soon

[catfact]

we very clearly need to fix this kind of stuff at the level of the c++ tape module.

[catfact]

... i'll attempt it this week / weekend i suppose.

[catfact]

...clearly I did not do that