Inputting empty Tempo Text name should list BPM
1. Open score.
2. Select note.
3. Create Tempo Text.
4. Select 'con moto'.
5. Delete the text.
Desired result: '(note length) = 132' appears in place of the deleted text.
Actual result: Nothing appears.
Discussion: This makes it easier to manage (delete, change, edit, make invisible, etc). It was first brought up here: #11245: MusicXML doesn't save Tempo Text if there's no name