Add Sub Menu Cap

[NotAKidoS]

Using a text editor you can add any amount of submenus to an expression menu asset, The emulator will display all of them.

VRChat only displays the first 8 options, with the 9th being used for Reset Avatar on the main menu.
(and the new avatar dynamics overlay)

This issue isn't really even an issue, just pointing it out cause I'm bored, and cause I managed to crash my Unity by adding 8000 sub menus that the emulator tried to render.

[lyuma]

Kappa

Since you can only add these through debug inspector or manual editing, I'm not so worried about people hitting this. I'll leave this open since it's technically a difference in behavior with ingame and hence a bug