[Injury] Adjust feature lists

[cise-midoglu]

Can order features:

• alphabetically (global)
• alphabetically (per-category)
• custom (check with @fidsinn, e.g., if there is an "importance" factor)

For listing all features in a dropdown: check if we can use a horizontal line delimiter, or something like subcategories within the dropdown

[BettyJJ]

I just checked and streamlit does not support subcategories in the options yet (see https://github.com/streamlit/streamlit/issues/5735). It does not support delimiters either. Ordering the options globally alphabetically is possible. Plus, it actually supports "type to filter"! It's a powerful feature but maybe a bit hard to notice. I didn't know it until just now. With this feature I think our problem should be mostly gone. 😊