[FEATURE] ExtraToolTips lock open container previews

[kamifi123]

Feature Request:
Add the ability to lock open container previews instead of them only staying open while being hovered over.

Problem Description:
I want to view the contents of nested containers without needing to hover. For example, I might want to see what’s inside a bundle that’s inside a shulker box, that's stored in an enderchest that’s in my inventory. Or, I want to check what enchantments are on an item inside a shulker box that's inside my endechest, thats in my inventory.

[John200410]

This is already a setting in ExtraTooltips