show image if timetable is locked

[GUEFFAZ ABDELKRIM]

show image if timetable is locked .To get the user's attention

[Liviu Lalescu]

I am sorry, but this seems impossible. Unfortunately, we cannot determine when a timetable is locked or not. Only if it is completely locked, but not necessary by locking, but possibly by preferred times constraints.

I will add your suggestions in the TODO list.