Better potion effect time

It's quite a basic concept, add an actual infinite potion effect and maybe with that a instant end timer(good for instant potions)
The commands are simple, use:
effect give <player> <effect> -1 <level> <visible or not> //For an infinite potion effect should be represented by the infinite symbol.
effect give <player> <effect> 0 <level> <visible or not> //For a potion effect that ends instantly after being given, does not appear on the inventory.