[Feature] Jump to alphanumeric index on list by key input.

[yurisuika]

A small QoL feature. When a list is sorted alphanumerically and is focused, a key input would jump to the index of where the input character is first found in the list. This could either be used simply for just the first character, or could ideally be a string with a timeout on input detection to conclude the query.

As a person with multiple thousands of artists in the library, this would be a nice QoL feature to make browsing more pleasant.