When using feature "change with time" notes are not requested if empty

[Death111]

When using the change with time feature I am sometimes not asked to add notes. Feature is active and notes are empty.

This may be related to the autosave feature. That it persists the entry with no comment, which may add a "no-notes" and not triggering the callback of the user then`?

Steps to reproduce:

1. Have work running > 1minute and add no note
2. Use "Change with time" feature
3. Project is changed without prompt to enter notes

Working

1. Have work running < 1minute and add no note
2. Use "Change with time" feature
3. Project is changed with prompt to enter notes

[Death111]

Fixed with #77