The 'Song' tab (Shift+F5) provides two ways to find audio files:

1. FTP file search - searches the FTP server directory tree for filenames.
2. Database search - searches the RadioBOSS MariaDB database by Artist, Title, Genre or Album.

Open the search with Ctrl+F. The search mode is selected via the radio buttons in
the 'Selection of data source' group.

The search mode is remembered and restored on next use.
Database search modes are only shown when a database connection is available.

Sub-chapters: FTP File Search, Database Search.
