Right clicking an interactible block sets PRIMARY instead of SECONDARY

[raccoonasdf]

This is behaviour that I know about but would be cumbersome to avoid, so I'm documenting it here.

As a server plugin, I have to limit myself to information the vanilla client volunteers to the server. As such, the closest heuristic I have to detecting left click that doesn't depend on being in reach of a block is when the client sends over the arm swing animation. Unfortunately, the arm swing animation also triggers when you right click a block that can be interacted with.

[raccoonasdf]

Maybe I can try mixin'ing PlayerController.activateBlockOrUseItem and prefer SECONDARY when a simultaneous PRIMARY and SECONDARY select happens? I'll need to investigate :)