Steps:
1. Open a tab "Courses"/"Subjects"
2. Click on the button "New"
3. Enter the name of the course/subject in the field "Name"
4. Enter description of the course/subject in the field "Description"
Expected results:
1. Only numbers and letters can be used
2. It is not possible to create a new course/subject entering special symbols in fields "Name" and "Description"
Actual results:
1. Special symbols in fields "Name" and "Description" can be used
2. It is possible to create a new course/subject entering special symbols in fields "Name" and "Description"