Incorrect warning about public static @Accessor in @Mixin class

[LeafHacker]

According to SpongePowered/Mixin#182, @Accessor mixins are one of the few exceptions to the "no public static members in @Mixin classes" rule, along with @Overwrite and possibly some others I am not aware of.

MinecraftDev currently flags this warning even when the public static member is annotated with @Accessor, which is incorrect.

[LeafHacker]

Probably should be a seperate issue, but it would also be nice if the error only applied to the member's modifiers, having the error underline the whole method and its body can get ugly - although I suppose ordinarily you would just fix the error.