Time logging incorrect for interrupted sessions

[anlag]

To reproduce:

1. Run tomatoshell to start a new session
2. Exit with 'q' after 5 seconds
3. Inspect ~/.local/share/tomatoshell/tomatoshell_log.csv

The log file reads:

2024-08-12,3,1500

This suggests I completed 3x 25 minutes of work rather than 5 seconds. The same happens if you skip ahead in sessions using 's'.