Enhancment: Port voicedelay/voicewait functions from question arcs

[drojf]

Currently plain delay commands are used for the answer arcs when a delay is needed for a voice to finish playing out. I think currently the normal delay doesn't let you continue until the delay has expired. The voicedelay/voicewait allow you to click to force the line to complete (but not 100% sure/didn't test it yet).

I'm not sure it's worth porting it at this point, as doing so may break things. But it's worth noting this down anyway.