Fixes#1727. Specifically, it removes a lot of old situations in which the stone of agony icon would've been hidden, such as shield and z-targeting. It will still be hidden while talking to an NPC or in cutscenes.
This does also introduce a subtle change in behavior. It now behaves a bit more like the Shard of Agony from the 3ds version. Instead of always being visible after the stone of agony is obtained, it is now hidden until you get close to a secret spot, appearing at a slightly further range than when the rumble would start.
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