Search: Include results from all libraries of the same type and restrict search to selected library

Feature Suggestions
1

Currently searching does not work if I have two music libraries where both libraries contain albums from the same artist.
Searching with the artist name only returns the albums from first library.
It would also be more intuitive to me if the search would be restricted to the currently selected library if I have selected one (global search could be a special option in the results).

2

Early 2021 clean-up: implemented