Allow ops to vanish

@wild1145#9683

We can. They come up in tab and in player form.

@Ashaz#9684 I've never seen them actually show in player form. Only on the tab.

@wild1145#9685 @Ashaz#9684 Vanished admins are essentially granted invisibility. Admins can only see other admins (in vanish) on tab, in the actual game they're invisible.. the most you can see is a couple of invisibility particles.

Example (in this picture, matt is in front of me in vanish):

@Shdwo#9702 Yeah that was my point, it's if we want to find a way to allow admins to actually see OP's (Like an outline or something) or not that's the question for me, as showing in tab is very different to seeing them IG

@wild1145#9703 I feel like that is definitely needed if this is going to be implemented. However what would be the point in granting OPs access to vanish when they can just add an invisibility potion to themselves and it would have the same effect? Admins would still be able to see them via /gmsp as a ghosty outline appears when viewing invisible entities.

And as for building near spawn, drinking an invisiblity potion or even using /effect would have the same outcome as giving them access to vanish. Other people would still be able to see blocks being placed and destroyed, just not the player model itself. You can even hide particles using /effect or potions.

If we block the ability to disguise as invisible falling blocks or entities, that would eliminate the possibility of hiding from admins (refer to my suggestion: https://forum.totalfreedom.me/d/909-remove-d…ock-entities/21). The only benefit I'd see out of allowing this would be ease of access as they wouldn't have to manually drink a potion or add an effect with a lengthy command.. other than that, it's useless

I think this feels like a good call, will mean we can block other ways (Like on the invisible blocks ones) later on and have a manageable way to allow OP's to vanish.

FS-166 raised to do this.