Add further information and configuration options to the song selection page

[Devin-Mix]

The song selection page currently shows a list of songs, information on whichever song is selected, and a button to start playback. In addition to this, the following features should be implemented:

• If no songs are detected, a text widget should be shown in place of the song selection list which states as much.
• The selected song's intended tuning should be shown
• Separate toggles should be available for playing the studio audio or tone wave during recording
• If a feature is implemented which allows for modification of the song and tone wave's speed, then such a configuration option should be present as well. If such a feature is declared out of scope for the project, this issue may be closed without it.