vincentsels/ProjectManagement — comment on commit cd044097ab15b63cba2c15ec89dba871dd6eed74
File: ProjectManagement/classes/ProjectManagementDoneColumn.class.php line 42
By vincentsels:

My reason for this is that there is no difference between '0 hours done' and 'blank hours done' - both mean that no work has been done for this ticket/work type. There *is* imo a difference between an estimation of 0 (you won't need any work of this kind) and 'blank' (no estimation was made), and between a todo of 0 (no more work left) and 'blank' (let the system calculate the todo).
Also, it is possible to 'clear' both the estimations and the todo - it isn't possible to 'clear' done.