Hi,
1. That is actually not possible – only taxonomy terms are possible to choose, but not the taxonomies as a whole.
2. This documentation should help you: Magnifier and Return button events
3. Make sure to have this option enabled: https://i.imgur.com/GHhWhhY.png
This should improve the highlighter greatly. It is not perfect, but should work for most cases.
4. Unfortunately no, the only way to do that is by custom coding.
5. That is a theme related issue. Themes cannot actually display other than post types as results (wordpress limitation) – the plugin actually converts those objects to taxonomy terms, but of course due to that some issues can occur. I think that icon reserved for the date, but since taxonomy terms does not have creation dates, it stays empty.
6. I don’t see the search box on the mobile view. Can you please link me to a page where it is visible? Searches initiated via the plugin search bar should work.
7. You can try enabling this option: https://i.imgur.com/Z5VieNy.png
The plugin will try to regularly check for it’s visibility, and if detects an invisible container, then hides all related elements as well.
8. Only on specific configuration, but it warns you when doing so
