WIP: Global RS Multipliers MCM page
Improved logic in NPC Sync Mode Changes MCM page

- Improved the way the menu enables/disables the OptionFlag.
Resume menu building

- This commit resumes actual menu building in Antono branch.
- Menu work that was done in the feature- branch was copied here.
- Code here still uses StringLists instead of StringValues. It can merge
with the feature- branch to be updated.
- Work in the menu shouldn't be affected by merge.