lms

Bug description

Is your feature request related to a problem? Please describe.
We can't send emails without using postmark service

Describe the solution you'd like
Allow using local sendmail command to send emails

Describe alternatives you've considered
Allowing to use an smtp server directly would be another option

Additional context
Action Mailer already supports these methods, so w

Describe the bug

When creating a Short-Answer question for a quiz and adding a long answer option the client does not display an error message, even though the quiz was not saved and a status code 500 is received.

To Reproduce

1. Create a Quiz
2. Add a short answer question
3. Add an answer option with 260 chars
4. Open the dev tools
5. Save the Quiz and observe that the quiz was

Reproduction Steps

• Change the format to day month year for the date in general settings
• create an order
• from the Student Dashboard open the order history
  

Expected Behavior

• the order shows with the different day month year format
• It does on the backend: ![

The most recent full CI build (at the time of this writing) failed due to connection refused, but it was just transient (manually browsed the site and confirmed it worked). We should add some retries to the full CI's smoke test code so that these transient failures wouldn't cause full CI failures. Relevant code is [here](https://github.com/Azu

This will allow to link tags like #class_a to a students.
Later we will be able to filter users using these tags.

For now, let's allow only the moderators to view the tags (not even the user himself).
This will allow the moderator to create private tags such as #fast_student or #needs_more_attention