[Feature] Allow checking truncation state inside components

[famiu]

Currently, truncation state of a component cannot be checked within components with the is_component_truncated and is_component_hidden functions. There needs to be a way for components to check whether another component in the same window is truncated or not. Maybe add a post_truncation option to components to evaluate some components after truncation?

[famiu]

Seems to be far too complicated to implement, more hassle than it's worth. So I decided I'm not going to implement it. If someone wants this feature, a PR is welcome as long as it doesn't mess up or overcomplicate the codebase.