"Choice Mode" mod menu option shows on chapters without any choices

## Problem

Previously, we had an in-game choice which appeared at the start of chapters which have choices, to select your choice mode. But otherwise you couldn't see or set it.

It was requested to add the option to the mod menu, both so you could see what option you have selected, and change that option at any time.

However, when I added this, I didn't hide the option on chapters with no choices/where the option does nothing.

This is confusing because a user may think a chapter has choices based on this option being available, then thing it was a bug that the option didn't work correctly.

## Fix

The option should either be removed on chapters with no choices, ~~or be replaced with the text "There are no choices in this chapter" (arguably a spoiler but it would be more clear)~~

I have decided to just hide the option completely when it doesn't apply to the chapter.

## Chapters with choices

Chapters 4,5,6 and Console have choices.

Look for the mod menu UI code that adds the 'Choice Mode' option. Identify the condition that checks if a chapter has choices (chapters 4, 5, 6, and Console). Hide the option when the current chapter is not in that list. Test by running the game and verifying the option appears only in those chapters.

Escrita pelo modelo de indexação a partir do texto da issue.