[Vanilla Bug] Prevent slow downs in main menu (mainly needed for wine)

[Bittah]

First Check

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Description

Constant hide/show cursor function calls can cause slow downs in main menu.
Might not be relevant for the TS Client unless it applies to the options menu as well.

Additional Context

ts-patches implementation: https://github.com/CnCNet/ts-patches/blob/master/src/main_menu_cursor_bug.asm