Updating date of existing time-spent entry (for tasks in projects) does not work

[priojk]

Bug

When editing a time spent entry, updateTimeSpent() in htdocs/projet/class/task.class.php can write a stale element_datehour to the database.

This bug is partially fixed in newer versions but not fully:

• 22.0: Bug reproduces from the UI whenever you change a date on a time spent entry.
• 23.0/develop: Bug reproduces from the UI only when you also change the task assignment. Additionally, any non-UI caller of updateTimeSpent() is affected.
• All branches: updateTimeSpent() has a weak fallback that should be aligned with addTimeSpent().

Dolibarr Version

22, 23, develop