[BUGFIX] Allow Scoped Modules to be active while targeting a nested substate

[TechnikTil]

Vocabulary

• Nested Substate
  • A substate initialized on top of an already existing substate.
  • Ex. Most Sticker Transitions, any substate on PlayState when using the chart editor.
• Recursive
  • A procedure or rule that is repeated.
  • Ex. Friday Night' Funkin recursively searching the game for scripted classes.
• Scoped Module
  • A Module that can only run in a specific state.

These are your vocabulary words for today's PR, thank you for re-experiencing the horrors of Language Arts class.

Description

Unfortunately, the ModuleHandler callEvent method only checks if the current state or substate on that state is active. This means that any nested substate won't activate scoped modules.

This PR makes sure this behavior doesn't happen by doing a recursive search through every substate, and checking if the substate is the state specified for the scoped module.