It became necessary in order to have different types for Tracks vs Albums,
instead of just differentiating by isDirectory: Boolean.
Also:
* Fix Album display in SearchFragment.kt
* Use same ids in all lists
* There is one database for each Server
* Index items are saved with a "musicFolderId" prop, which makes it possible to filter the database by musicFolder without necessarily having to query the server for it.
* Databases for new Servers are created on the fly
* If the user removes a server, the respective database is deleted.
tzugen
Nite
Yahor Berdnikau