Wind charges have no cooldown when used by a dispenser

Dispensers have a cooldown of half a second when used by a player, but this isn't the case when used by a dispenser. This could be intentional or a feature request, but that's up to Mojang to decide.

Steps to reproduce

1. Place a dispenser
2. Put wind charges in it
3. Set up a fast clock for it

Observed result: The dispenser fires more than 2 wind charges per second due to the lack of a 0.5 second cooldown.

Expected result: The dispenser should have a 0.5 second cooldown and not fire wind charges that quickly.