Removed Bolonha 1st cycle degrees from incoming mobility programmes options.
Added support for modifying a student's mobility programme.
Modified criation of incoming mobility vacancies to allow the creation of multiple vacancies at the same time
Added support for modifying a student's chosen degree.
Closes #522
Closes #525: Modified exported xls file to include username and separate each field in a different cell
Removed commented code on line 407
Created interface to display erasmus students that aren't enrolled in all shifts
Implemented automatic e-mails to erasmus students that aren't enrolled in all shifts
Fixed bug that showed master thesis as courses without enrolled shifts
Added message when email is sent successfully
Minor change: added missing labels
Merge branch 'ticket/419529' of https://github.com/AfonsoFGarcia/fenix into AfonsoFGarcia-ticket/419529
students who are no longer active members still belong to execution courses that they attended.
Merge pull request #539 from cbartol/ticket/rt#420708

Alumni have now access to the content of execution courses that they attended.
Minor change: change the role type to the correct one
Merge pull request #524 from AfonsoFGarcia/externalCandidacies

Removed Bolonha 1st cycle degrees from incoming mobility programmes options.
Added support for modifying a student's mobility programme.
Modified criation of incoming mobility vacancies to allow the creation of multiple vacancies at the same time
Added support for modifying a student's chosen degree.
Closes #522
Merge pull request #526 from AfonsoFGarcia/ticket/418569

Closes #525: Modified exported xls file to include username and separate each field in a different cell
Modified curriculum renderer to display optional enrolments in the correct language
Display message when an e-mail template for a given mobility process does not exist
Merge branch 'ticket/419529' of https://github.com/AfonsoFGarcia/fenix into AfonsoFGarcia-ticket/419529
Avoid programming normal application flow via exception handleing whenever possible.
Merge branch 'AfonsoFGarcia-ticket/419529' into develop
Merge pull request #541 from AfonsoFGarcia/ticket/420793

When displaying a student's registration curriculum, the name of optional enrolments is now presented in the language the user has selected.