Fix the list of courses for the events

Show only the courses of the select period
Calendar format fixed, Event name validation unique remove
student_upload text to English and assignation success notification
Fix date of items and fix the email

Fix the date of the items and replace the \n in the notification for
<br>
Fix the email in the administrator rol

Fix the \n to <br> in the administrator rol
Fix the view of report in the administrator

Fix the reports that can see the administrator.
Change the if of created.month>7 to .month>=7. Fix the year of the final
period of the student practice
Improvements to the system. (Control-Monitoring)

*Position and size of the modal in the records notifications.
*Changing the name in the footer.
*Registration sorted by most recent post.
*Signature was changed to display or assistant teacher.
Add "Manual comunicacion entre catedraticos y estudiantes"
Merge master to Development

Conflict Solved