/trigger autocompletes inactive triggers

To reproduce, create a new trigger, assign yourself a score for it and trigger it once so it no longer is active:

/scoreboard objectives add testTrigger trigger
/scoreboard players set @p testTrigger 1
/trigger testTrigger set 1

Then try to tab-complete /trigger testTrig and see how it fills in "testTrigger" even though you can't trigger it.