Show character limits and max attachment size at message bodys (students & classes)
Summary of the new feature/enhancement
proposed by @dimidasko
Show a message to the user to inform them about the limit. A good scenario would be to add a count down too.
The limit of the max attachment size should be visible as well.
Justify the new feature/enhancement
Teachers would benefit to plan ahead their message if they know their constraints. This is a request from teachers alongside with #250
Proposed technical implementation details (optional)
In case of counter, the counter should be updated on input and paste events.
Edited by Dimitris Daskopoulos