Notification template for solo endorsements

[Atriusftw]

Is your feature request related to a problem? Please describe.
Not really a big problem, but it would help with providing up to date and accurate information to students regarding solo endorsements.

Describe the solution you'd like
Make it possible to edit the body of the e-mail students get when solo endorsements are granted, via a notification template.

Describe alternatives you've considered
Manually sending the e-mail.

Additional context
This would very much help with making students aware of their responsibilities during the solo and options like booking.

[blt950]

Thanks. This is currently not planned, but I'm leaving this open if someone wants to contribute or pick up this request.