... or provide some other way to temporarily override the selected item. Maybe alt-rightclick to blacklist it for 5 minutes.

Use case: This morning I was leveling an alt in Un'goro and picked up the quest to bait diemetradons into the spike pits, but some other guy was farming the diemetadons around the pits (who knows why) and I couldn't get any further-out ones to follow all the way to the pit, so I just went to do some other quests in the meantime. However, since the "map blob" for that quest covers about half the zone, the bait item took priority over several other quests' items and I had to manually use them from my bags.

Granted, this kind of situation doesn't come up often, but with the buttons on the objectives tracker being completely unusable due to everything everwhere tainting them all the time, it's pretty annoying when it does. :(

I was thinking about something like this too, the use-case I saw was for a dungeon quest where you wouldn't want the button showing up for something at the very last boss.

What I might do is when you alt-rightclick (or something) the button, a slider shows up, where you can set it to hide for anything between a minute and a full session. I have not decided yet.

The button was actually designed to ignore untracked quests, but I never added a proper event to update it.

This might be more than enough to solve this issue, although I may reopen this later.